AFAIK, As Far As I know
AFK, Away From Keyboard
AKA, Also Known As
ASAP, As Soon As Possible
ATYS, Anything You Say
Acronimo
B4, Before
BAK, Back At Keyboard
BBFN, Bye Bye For Now
BBIAB, Be Back In A Bit
BBL, Be Back Later
BBS, Be Back Soon
BCNU, Be Seein' You
BRB, Be Right Back
BTW, By The Way
CUL, See You Later
CUL8R, See You Later
Chat acronym
Chat
DIIK, Damned If I Know
DYJHIW, Don't You Just Hate It When
EG, Evil Grin
F2F, Face-To-Face
FDROTFL, Falling Down Rolling On The Floor Laughing
FITB, Fill In The Blanks
FOAF, Friend Of A Friend
FOTCL, Falling Off The Chair Laughing
FWIW, For What It's Worth
FYA, For Your Amusement
FYI, For Your Information
G, Grin
GA, Go Ahead
GBH, Great Big Hug
GIWIST, Gee I Wish I'd Said That
H, Hug
HB, Hug Back
HH, Ha Ha
ICOCBW, I Could Of Course Be Wrong
IDK, I Don't Know
IMHO, In My Humble Opinion
IMO, In My Opinion
IOW, In Other Words
IWBNI, It Would Be Nice If
J/K, Just Kidding
JAM, Just A Minute
JAS, Just A Second
K, Kiss
KB, Kiss Back
KISS, Keep It Simple Stupid
KOTC, Kiss On The Cheek
L8R, Later
LOL, Laughing Out Loud
LTLYB, Love To Love You Baby
MORF, Male OR Female
MYOB, Mind Your Own Business
NBD, No Big Deal
NHOH, Never Heard Of Him/Her
NP, No Problem
NRN, No Reply Necessary
OBTW, Oh By The Way
OIC, Oh I See
OTOH, On The Other Hand
PITA, Pain In The Ass
PMJI, Pardon My Jumping In
RL, Real Life
ROTFL, Rolling On The Floor Laughing
ROTFLMAO, Rolling On The Floor Laughing My Ass Off
S, Smile
SB, Smile Back
SOL, Sh*t Outta Luck
SUP, What's Up?
SWEIN, So What Else Is New?
SYL, See You Later
TAFN, That's All For Now
TIA, Thanks In Advance
TTBOMK, To The Best Of My Knowledge
TTFN, Ta-Ta For Now
TTUL, Talk To You Later
TTYL, Talk To You Later
TTYS, Talk To You Soon
UOK?, Are You OK?
VEG, Very Evil Grin
VES, Very Evil Smile
VWG, Very Wicked Grin
VWS, Very Wicked Smile
W, Wink
WG, Wicked Grin
WTH, What The Hell
WTHDTM, What The Hell Does That Mean?
YAFIYGI, You Asked For It, You Got It