Tired of looking at that 1 acronym and not knowing what it means? Here is a COMPLETE list of internet slang:
10q Thank you
1337 From the word Leet, derived from the word elite
2 Too, or to
2L8 Too late
2U2 To you too
<3 - Love (a sideways heart)
404/403 I haven't a clue; from the code for the common "Not Found" HTTP error message
4GM Forgive me
?4U Question for you
AAMOF As a matter of fact
ADN Any day now
AFAICR/S/T As far as I can recall / remember / see / tell
AFAIK As far as I know
AFK Away from keyboard
AKA Also known as
AITR Adult in the room
AIUI As I understand it
AMHIK Ask me how I know
ANFSCD And Now For Something Completely Different. Used to change the subject of conversation
ASAP As soon as possible
Age/sex/location|ASL or Age/sex/location|A/S/L Age / sex / location
ATEOTD At The End of the Day
ATM At the moment
ATYS Anything you say
AWA As well as
AWOL Absent Without (Official) Leave
AYBABTU (also abbreviated as AYB) All your base are belong to us (from the video game Zero Wing)
borked - Thoroughly broken
B2B Business to Business
BB - Bye bye
BBIAB Be back in a bit
BBIAF - Be back in a few / flash
BBL/S Be back later / shortly / soon
BBQ Be back quick
BCNU Be seein' you
BF - Boy friend
BFF - Best friends forever
BFFL - Best friends for life
BFN Bye for now
BFFN - Best Friend For Now
Blog Also known as web log or an online journal
BOF Beginning of file
BOFH ******* operator from hell
BOHICA - Bend Over Here It Comes Again
Bot Any type of automated software in chatrooms and web-cataloguing software
Br/BR Best regards
BRB Be right back
BRT Be right there
BS Backstab / Bull****
BSOD Blue Screen of Death
BTDT Been there done that
BTDTGTTSAWIO - Been there, done that, got the T-shirt and wore it out
BTW By the way
Bump Increment (For example, C++'s operator.) or a backronym for "Bring Up My Post"
BW or B/W Between or black-and-white.
CD9 - Code 9 - Parents nearby
CBA Can't Be Arsed. A term to indicate or dictate laziness.
CBF Can't Be F***ed. A term used frequently out of laziness.
chown Change owner. (used in Unix systems)
CMIIW Correct me if I'm wrong
Crawl To retrieve a web page along with the hyperlinks that reference it
Crapplet A poorly written computer application
CTN Can't Talk Now
CU See you (later)
CYA See ya OR Cover Your Ass
Cyber (prefix) A term used to connect the subsequent word loosely to the world of computers.
Cyberspace Virtual reality, the Internet, the World Wide Web, and other kinds of computer systems. Science fiction author William Gibson popularized the term in his novel Neuromancer. Gibson used the word to describe a virtual world of computer networks that his cyberpunk heroes 'jacked into'
DDG Drop Dead Gorgeous
DFTT Don't feed the trolls
DGAF Don't Give A F***
DIAF Die in a fire
DILLIGAF/D/S Does it look like I give a flip / f*** / damn / ****
DND Do not disturb
DOA Dead on arrival. Refers to hardware that has never worked.
DW Don't Worry.
EOF End Of File
EOM End of Message
EOL End of Life. Device or hardware that is at the end of its product life cycle
ETA Estimated time of arrival, later (especially on blogs), Edited To Add-
FAQ Frequently Asked Question(s)
FFS For f***'s sake
Flamer Someone who makes inflammatory, abusive or directly offensive comments. Similar to, but not quite the same as an Internet troll
FMCDH From My Cold Dead Hands
FOAD/FOND F*** off 'n'/and die
FOAF Friend of a friend
FP First Post
FTFY Fixed That For You
FTL For the lose / loss
FTW For the win / f*** the world
FU F*** you
FUBAR F***ed up beyond all recognition / repair
FUD Fear, Uncertainty and Doubt (the purposeful spread of misinformation)
FWIW For what it's worth
FYI For your information
GBCW Goodbye Cruel World - a dramatic leave taking of a forum or site 
GBTW Get back to work
GD - Good day
GF Great/good fight; or girlfriend
GFETE Grinning from ear to ear
GFY Good for you
GG Good game, used at or near the conclusion of a gaming match, also used to describe a game that is very one sided and therefore considered already over
GGF Go Get F***ed
GIYF Google is your friend
GL Good luck, often used at beginning of a contest
GLHF Good luck and have fun
GLTYT Good luck to you, too, a formal response to "gl"
GJ Good job
GMTA Great minds think alike
Godwin's Law Dictates that the longer a thread, the more likely someone will post a comparison involving Nazis or Hitler
GTH (or G2H) Go to hell
GTFO Get the f*** out OR Get the f*** off
GTG or G2G 'Got to go' or 'Good to go'
GR Gateway Router
HAND Have A Nice Day
Handle Name used in online chat, (AKA nick(name), alias, screen/user name)
HF Have fun/High-five
Haxor or H4x0r (1337) Hacker
Hit A request made to the web server, (noun) the results of an internet search, (verb) loading a Web page. Hits are not equivalent to visitors of a webpage.
Home page The website's introduction page, starting point, and guide. The technical term is "index"
Hot list A collection of publicly available URLs (World Wide Web site addresses), sometimes available as text files.
HTH Hope this / that helps, or happy to help
IANAL I am not a lawyer
IAWTC I agree with that/this comment
IBTL In before the lock
ICB I Can't Believe 
ID10T Fictitious software error code for "idiot" (e.g. "you got an ID10T error")
IDC I don't care
IDGAF - I don't give a f***
IDK I don't know
IHY I hate you
IINM If I'm not mistaken
IIRC If I recall / remember correctly
IIUC If I understand correctly
ILY I love you
IMO/IMHO/IMNSHO/IMAO In my (humble / honest / not so humble / arrogant) opinion
Information superhighway The Internet (AKA: I-way, infobahn)
IONO I don't know
IOTTMCO Intuitively obvious to the most casual observer (sometimes IOTTMCOO .... of observers)
IOW In other words
IRC Internet Relay Chat
IRL In real life
ISTR - I Seem To Recall
ITYM I Think You Mean
IWSN I want sex now
IYKWIM If you know what I mean
IKWYM I know what you mean
Jaggy Aliased computer graphics
JAS Just a second
JIC' Just in case
JFGI Just F***ing/Freaking Google It
JK or j/k Just kidding, or joke
JSYK - Just so you know
JFTR Just for the records 
JOOC Just out of curiosity 
JW Just wondering 
JFK Just F***ing Kidding
k or kk OK
KIR Keeping it real.
KISS Keep it simple stupid.
KIT Keep in touch.
KMA Kiss my ass
KOS Kill on sight
KOTC/L Kiss on the cheek/lips.
KTHX OK, thanks
KTHXBAI or KTHXBYE OK, thanks, goodbye, used either to cut short a conversation or to express displeasure with being cut short
KWIM Know what I mean?
L2P Learn to play; an admonishment to new or incompetent video game players.
L8R Later (sometimes abbreviated to L8ER); is commonly used in chat rooms and other text based communications as a way of saying good bye.
Lag Slang term for slow Internet speeds or high Internet latency; Lag is sometimes due to a server problem, but more frequently due to the connection between client and server. A slow or intermittent connection may often be referred to as laggy
Lamer A know-nothing, one who is lame.
Leet Often spelled as l33t or 1337 in ASCII form. It originally meant elite
LFG, LFP Looking for group, looking for (hunting) party. Typically used in relation to MMORPGs.
LFM Looking for more
LMAO, LMFAO, LMMFAO Laughing my ass off, laughing my f***ing ass off, laughing my mother f***ing ass off
LMIRL Let's meet in real life.
LMK Let me know
LOFL Laughing out f***ing loud
LOL Laughing out loud, laugh out loud. Occasionally: lots of love, lots of luck
LOTI Laughing on the inside
LTNS Long time no see
Lulz A corruption of LOL, which stands for laugh out loud.
Lurker Someone who frequents a Usenet group without participating in discussions
Luser Loser + user; an annoying user from the perspective of tech support or a system administrator; also spelled luzer or luzzer.
LYLAB Love you like a brother
LYLAS Love you like a sister
Meh A term meaning bored or unimaginative. Common use on forums.
MMORPG, MMO Massive Multi-player Online Role Playing Game
MMOFPS Massive Multi-player Online First Person Shooter
MOO MUD (Multi-User Dungeon) Object Orientated 
MOTD Message of the day
MT Miss tell
MTFBWY May The Force be with you
MUD Multi-User Dungeon
MUSH Multi-User Shared Hallucination
MYOB Mind your own business
N2M Not(hing) too much
N2B Not too bad
Newbie - A user who is new to a system or game.
noob, or n00b An alternative spelling of "newb" (short for "newbie"), although generally used in a derogatory context; a user who is ignorant about a system or game
NFW No f***ng way
NM (Sometimes written N/M) Not much, Never mind or no message, used on message boards or in e-mails to indicate that everything is already said in the subject line.
NN No need (used in trading during online gaming (such as Diablo 2). Night night. Used as an alternative for "good night"
NP No problem
NSFW Not safe for work. Warning about content that may get the viewer in trouble with his employer or co-workers.
NTL Need the loo
NTY No, Thank You
NVM, NVMD, or nm Nevermind, not much
O RLY Oh really?
OH OK A sarcastic okay 
OIC Oh, I see
OFN Old f***ing news
OMG Oh, my Gosh/God
OMFG Oh, my f***ing God
OMGWTFBBQ- Oh my God, What the F***, Barbecue
OMW On my way or Oh my word
OOC Out Of Character / Out Of Combat
OP Original poster / Operator / Outpost
OS Operating system
OT Off topic
OTOH On the other hand
OTP On the phone or One true pairing
P2P Peer to peer, or pay to play
P911 Parent emergency (watch what you type)
PAW Parents are watching
PEBKAC Problem exists between keyboard and chair
Ping From the popular network monitoring tool, used as a greeting similar to "Are you there?".
PHD - Perverted Homosexual Donkey
PHDF - Perverted Homosexual Donkey F***er
PITA Pain in the arse / ass
PLMK Please let me know
plz or pls Please
PM Personal message or private message
PMJI Pardon my jumping in
PMSL Pissing My Self Laughing
::POOF:: Goodbye (leaving the room) 
POS Piece of ****, parent over shoulder, packet over SONet, or Point of Sale.
POTS Plain old telephone service
POV Point of view
PST Please send tell
PTKFGS Punch the Keys For God's Sake
pr0n Intentional misspelling of porn
PW Persistent World (gaming)
pwned or pwnd Owned
QFA Quoted for accuracy. Similar to QFT
QFT Quoted for truth, Quit f***ing talking
Rehi (or merely re) Hello again
RL Real Life
RO(T)FL Rolling on (the) floor laughing
RO(T)FLMAO Rolling on (the) floor laughing my ass off
RO(T)FLOL Rolling on (the) floor laughing out loud
RSN Real soon now (often used sarcastically)
RTFB Read the f***ing binary (or book)
RTFQ Read the f***ing/fabulous (polite)/freaking (polite) question 
RTFS Read the f***ing source
RTFM/RTM Read the f***ing manual
RYC Regarding your comment
SCNR Sorry, could not resist
Smiley Another name for emoticons
SMH Shaking my head
SNAFU Situation normal: all (f***ed/fouled) up
Snail mail Normal paper mail service
Spider The program behind a search engine
Sry - Sorry
STFU Shut the f*** up
STFW Search the f***ing web
SWIM Someone Who Isn't Me
T4P - Tell for people
TANSTAAFL There ain't no such thing as a free lunch, from Robert A. Heinlein's novel The Moon Is a Harsh Mistress
TBF Time between failures
TBH, TBQH To be (quite) honest
TFTC Thanks for the Cache, a Geocaching term
TG That's great
TGIF Thank God it's Friday
TH(N)X, TNX or TX Thanks
TIA Thanks in advance
TINC There Is No Cabal, a term discouraging conspiracy theories
TISNF - This is so not fair
TL;DR - Too Long; Didn't Read, an admonishment that a post is too lengthy or lacks worthwhile content
TMI Too much information
TOS Terms of service
TPW Top Post Whore
TTBOMK To the best of my knowledge
TTFN Ta ta for now
TTT To the top, used in forums to bump a thread
TTTH Talk to the hand
TTYL Talk to you later (also spelled TTUL, T2UL or T2YL)
TTYS Talk to you soon 
TTYTT To Tell You The Truth
Tweedler One who has deep love for all computer related technology and gadgets
TWIAVBP - The World Is A Very Big Place, used to flag regionally-specific usages. Example: "We ate roasted corn (TWIAVBP: maize) at the picnic."
TWIMC To Whom It May Concern
TY or Thx Thank you
TYT Take your time
TYVM Thank you very much
U, Ur You, your, you're
UTFSE Use the f***ing search engine
VB(SE)G Very big (****-eating) grin.
VEG/S Very evil grin/smile.
Vlog Video blog 
VWG/S Very wicked grin/smile.
w00t, w00T or WOOT First two express exuberance, and the last is a backronym for the term "We Own the Other Team".
W/ or W/O With or without
WB Welcome back
WBU What 'Bout (about) You
WD Well Done
WP Well Played
WRT With respect / regard to
WRUD What are you doing?
WTB Want to buy
WTF What the f***
WTG Way to go
WTH What the hell, What the heck
WTS Want to sell
WTSHTF When The **** Hits The Fan
WTT Want to trade
WUG What you got?
WUBU2 What (have) you been up to?
WUU2 What (are) you up to?
WUW What you want?
WWJD - What Would Judas Do?/We Want Jack Daniels
WYSIWYG What you see is what you get
WYSIWTF What you see is what the f*** - what Microsoft Frontpage's "WYSIWYG" interface should really be called UserFriendy Comic Strip.
Y Yes, Why
YA RLY Yeah Really (invariably preceded by "O RLY")
YHBT You have been trolled.
YHL You have lost
YKW You know what?
YMMV Your mileage may vary.
YT You there?
YTMND You're The Man Now, Dog
YW You're welcome.
YOYO You're On Your Own.
YOYOW - You own your own words.
ZOMG (sometimes OMGZ) A variation of OMG (Oh my Gosh/God) used to indicate extreme excitement
ZOMGWTFBBQ - A variation of ZOMG and OMG, also used to indicate an extremely surprising and exciting event.
Ignore the  stuff, I just copied 'n pasted this. xD