Other Abbreviations;

ADN Any Day Now
AFK Away From the Keyboard
AFN that's All For Now
a/s/l Age/Sex/Location - (used to ask a chatter their personal information)
AV Avatar - Graphical representation of a person chatting.
BBL Be Back Later
BFN Bye For Now
BR Best Regards
BRB Be Right Back
BRH Be Right Here
BTW By The Way
CU See You
CUL8R See You Later
CUOL See You On Line
CYA See You - (as in "See you later)
DIS Did I Say
DL -or d/l Download... or downloading.
EG Evil Grin
EOT End Of Thread (meaning end of discussion)
F2F Face To Face
FAQ Frequently Asked Question
FISH First In Still Here (someone who is on line TOO much)
FOCL Falling Off Chair - Laughing
FUBAR "Fouled" Up Beyond All Repair / Recognition
FUD Fear, Uncertainty, and Doubt
FWIW For What It's Worth
FYI For Your Information
GA Go Ahead
GAL Get A Life
gest Gesture - a combination text / audio / video file played in VP Chat rooms
GR Gotta Run
GTRM Going To Read Mail (leaving chat room to check email)
IAC In Any Case
I ANAL (or IANAL) I'm Am Not A Lawyer (expect an uninformed opinion)
IC I See
ILU or ILY I Love You
IMHO In My Humble Opinion (IMO = In My Opinion)
IOH I'm Out of Here
IOW In Other Words
IRL In Real Life
JIC Just In Case
K -or- kk O.K.
JK -or- j/k Just Kidding
L8R Later
LMAO -or- LMFAO Laughing My (F'ing) Ass Off
LOL Laughing Out Loud
mug Person chatting in VP rooms using their browser (IE, Netscape)... instead of the download client program.
NFW No Feasible (or F***ing) Way
NP No Problem
NRN No Response Necessary
OIC Oh, I See
OJ or OK Only Joking or Only Kidding
OTOH On The Other Hand ...
OTMH Off the Top of My Head ...
OTW On The Way (used when someone is sending a file)
PANS Pretty Awesome New Stuff (often referring to computer technology)
PCMCIA Personal Computer Memory Cards International Association
PCMCIA People Can't Master Computer Industry Acronyms (slang)
PEBCAK Problem Exists Between Chair And Keyboard
PITA Pain In The Ass
POTS Plain Old Telephone Service
ROFL Rolling On Floor, Laughing
ROTF Rolling On The Floor - (refers to someone laughing very hard)
ROTFLMAO Rolling On The Floor, Laughing My Ass Off
RSN Real Soon Now
RTFM Read The "Flippin" Manual
(response to beginner question on net, chat, newsgroups, etc.)
SEG Shit Eating Grin
SNAFU Situation Normal, All "Fouled" Up
SOL Shit Out Of Luck
SOTA State Of The Art (latest technology)
SY Sincerely Yours
SYL See You Later
TAFN That's All For Now
TFH Thread From Hell (a topic or discussion that won't stop - esp. newsgroups)
TGIF Thank Goodness It's Friday
THX Thanks!
TNT Til Next Time
TPTB The Powers That Be
TTFN Ta-Ta For Now
TTYL Talk To You Later
TY Thank You
VPPH Virtual Places Page Host. (Others now using software on their own servers to talk to VP clients in the same manner that Excite once did)
VN Very Nice
WC Welcome... as in "You are Welcome"
WEU What's Eating You?
WFM Works For Me
WT? What The ...? or Who the ...?
WTGP? Want To Go Private? (move to a private chat room)
YW You're Welcome

It does.

But not LMFAO.

LMAO = Laughing My Ass Off

Yes pretty girl it does!

No, it means "laughing my a** off," once you replace the asterisks with Ss.