Common chat acronyms and their meanings are listed below:
#

2
To
411
Information
A

AFAIK
As far as I know
AFK
Away from keyboard
AIM
AOL Instant Messenger
AKA
Also known as
AOL
America Online
ASAP
As soon as possible
B

b/c
Because
B/W
Between
b4
Before
BBIAB
Be back in a bit
BBL
Be back later
BCC
Blind carbon copy
bf
Boyfriend
BFF
Best friends forever
BFN
Bye for now
BOT
Back on topic
BRB
Be right back
BTW
By the way
C

CC
Carbon copy
CTN
Can't talk now
cya
See ya
CYE
Check your e-mail
D

DIY
Do it yourself
dl
Download
E

ETA
Estimated time of arrival
F

f
Female
FAQ
Frequently Asked Questions
fb
Facebook
FWIW
For what it's worth
FYI
For your information
G

gb
Goodbye
gf
Girlfriend
GG
Good game
GJ
Good job
GL
Good luck
gr8
Great
GTG
Got to go
H

HOAS
Hold on a second
HTH
Hope this helps
hw
Homework
I

IAC
In any case
IC
I see
IDK
I don't know
IIRC
If I remember correctly
IM
Instant Message
IMO
In my opinion
IRT
In regards to
J

J/K
Just kidding
K

K
OK
L

L8
Late
L8R
Later
LMK
Let me know
LOL
Laughing out loud
LQTM
Laughing quietly to myself
M

m
Male
MMB
Message me back
MMO
Masively Multiplayer Online
msg
Message
MYOB
Mind your own business
N

N/A
Not Available
NC
No comment
ne1
Anyone
NM
Not much
NP
No problem
NTN
No thanks needed
O

OMG
Oh my gosh
OT
Off topic
P

PIR
People in room
PK
Player Killing
pls
Please
POS
Parent over shoulder
ppl
People
pwn
Own
Q

qt
Cutie
R

RE
Regarding
ROFL
Rolling on the floor laughing
ROTFL
Rolling on the floor laughing
RPG
Role Playing Game
S

SOS
Someone over shoulder
sup
What's up
T

TBA
To be announced
TBC
To be continued
TC
Take care
thx
Thanks
TIA
Thanks in advance
TISNF
That is so not fair
TLC
Tender love and care
TMI
Too much information
TTFN
Ta-ta for now
TTYL
Talk to you later
txt
Text
TY
Thank you
U

U2
You too
ur
Your
V

VM
Voicemail
W

W/
With
w/e
Whatever
w/o
Without
W8
Wait
WB
Write back
X

XOXO
Hugs and kisses
Y

Y
Why
YW
You're welcome
Z

ZZZ
Sleeping
Pasted from <http://www.sharpened.net/glossary/acronyms.php>