This is by no means a complete list, but should get you up to speed.
 
A few Acronyms and Abbreviations that you can use in the chatroom, might be useful to let your friends know about them. If you are familiar with mobiles and texting, then these work in a similar way. Acronyms are shortened versions of a longer word or sentence.
Acronym
A/S
A/S/L or ASL
AAK
AAR
AAS
ADN
AFAIK
AFK
AFN
AKA
AOTA
ASAP
B
B/F
B4
BAK
BBIAM
BBL
BBS
BCNU
BDT
BEG
BF
BFN
BLNT
BMA
BO
BR
BRB
BRH
BSEG
BTA
BTU
BTW
BTW
CP
CRS
CU
CUL
CUL8R
CUOL
CUS
CYAL8R
D/L, DL
DDSOS
DEGT
DIKU
DIS
EG
EM
EMA
EMSG
EZ
F2F
FAQ
FISH
FITB
FOCL
FUBAR
FUD
FWIW
FYI
G/F
GA
GAG
GAL
GF
GFN
GG
GGOH
GGP
GL
GL2U
GL2U2
GLA
GLAC
GLE1
GLNG
GLNT
GM
GMTA
GN
GR
GR&D
GR8
GRN
GTR
GTRM
GTSY
H&K
HAGD
HAGN
HAGO
HB
HHIS
HTH
HUGGLES
IAC
IANAL
IB
IC
IDK
IDTS
IGP
ILU or ILY
IM
IMHO
IMO
IOH
IOW
IRL
IYKWIM
IYO
JAS
JIC
JK
JMO
JTLYK
JW
K, or KK
KIT
KOTC
KOTL
L8R
L8R G8R
LMAO
LMBO
LOFTING
LOL
LTNS
LTS
LUWAMH
LY
LYL
MNC
NE1
NETUA
NIMBY
NM
NP
NRN
NT
OBTW
OF
OIC
OJ or OK
OL
OM
OMG
OMG
OT
OTE
OTFL
OTOH
OTOMH
OTP
OTW
PEBCAK
PEEP THIS
PEEPS
PITA
PLZ
PM
PMJI
PMP
POOF
POS
POTS
PPL
QT
R
RAG
RE
ROFL
ROFLPIMP
ROTF
ROTFLMAO
RSN
RTF
RTFM
RTSM
RU
SAC
SD
SH
SNAFU
SO
SOHF
SOL
SOS
SOTA
SPAM
SPST
SRY
SS
SSDD
STR8
STU
STW
SWAK
SWL
SY
SYL
SYS
TAFN
TC
TGIF
THX
TIA
TM
TMI
TNT
TOY
TPS
TPTB
TRDMF
TS
TSFY
TTFN
TTTT
TTYL
TX
TY
TYT
TYU2
TYVM
U
US
UV
UW
UY
VEG
WB
WC
WD
WEG
WEU
WFM
WIIFM
WT?
WTG
WTGP?
WTH
WWJD
WYSIWYG
YAA
YAG
YBS
YL
YLO
YM
YMMV
YR
YSR
YVW
YW
Meaning
Age/Sex
Age/Sex/Location - (used to ask for personal information)
Alive And Kicking
At Any Rate
Alive And Smiling
Any Day Now
As Far As I Know
Away From Keyboard
that's All For Now
Also Known As
All Of The Above
As Soon As Possible
Back
Boyfriend (also shown as B/F, or BF)
Before
Back At Keyboard (I'm back)
Be Back In A Minute
Be Back Later
Be Back Soon
I'll Be Seeing You.
Bout Darn Time
Big Evil Grin
Boyfriend
Bye For Now
Better Luck Next Time
Bite My A**
Blackout
Best Regards
Be Right Back
Be Right Here
Big S**t Eatin Grin
But Then Again....
Back To You
By The Way
BeTWeen you and me ...
Chat Post
Can't Remember S**t
See You - also posted as cya
See You Later (C U Later)
See You Later
See You On Line
Can't Understand S**t (stuff)
See You Later
Downloading, or Download it.
Different Day, Same Old S**t
Don't Even Go There
Do I Know You?
Did I Say
Evil Grin
E-Mail
E-mail Address = what is your email address)
Email Message
easy (one of the really old ones)
Face To Face
Frequently Asked Questions
First In Still Here (someone who is on line TOO much)
Fill In The Blanks
Falling Off Chair - Laughing
Fouled Up Beyond All Repair / Recognition
Fear, Uncertainty, and Doubt
For What It's Worth
For Your Information
Girlfriend (also shown as G/F, or GF)
Go Ahead
Green And Gone
Get A Life
Girlfriend
Gone For Now
Good Going
Gotta Get Outta Here
Gotto Go Pee
Good Luck!
Good Luck To You
Good Luck To You Too
Good Luck All
Good Luck All Close
Good Luck Everyone
Good Luck Next Game
Good Luck Next Time
Good Morning
Great Minds Think Alike
Good Night
Gotta Run
Grinning, Running, and Ducking.
Great
Green
Got To Run
Going To Read Mail (leaving chat room to check email)
Glad To See You
Hugs and Kisses
Have A Good Day
Have A Good Night
Have A Good One
Hurry Back
Hanging Head In Shame
Hope That Helps
Hugs
In Any Case
I'm Am Not A Lawyer (expect an uninformed opinion)
I'm Back
I See
I Don't Know
I Don't Think So
I Gotta Pee
I Love You
Instant Message
In My Humble Opinion (or In My Honest Opinion)
In My Opinion
I'm Out of Here
In Other Words
In Real Life
If You Know What I mean
In Your Opinion
Just A Second
Just In Case
Just Kidding
Just My Opinion
Just To Let You Know
Just Wondering
O. K.
Keep In Touch
Kiss On The Cheek
Kiss On The Lips
Later
Later Gator
Laughing My Arse Off
Laughing My Butt Off
Talking In Private Chat (The Loft)
Laughing Out Loud
Long Time No See
Laughing To ones Self
Love You With All My Heart
Love You or I Love Ya
Love You Lots
Mother Nature Calls
Anyone
Nobody Ever Tells Us Anything
Not In My Back Yard
Never Mind
No Problem
No Response Necessary
No Thanks
Oh, By The Way.
Old Fart, someone who has been around for a while.
Oh, I See
Only Joking or Only Kidding
the Old Lady
the Old Man
Oh My God (Goodness)
Oh My Gosh
Off Topic
Over The Edge
On The Floor Laughing
On The Other Hand
Off the Top of My Head ...
On The Phone
On The Way
Problem Exists Between Chair And Keyboard
Hey, listen to this, I've got some interesting news.
People (lot of peeps in this room)
Pain In The Arse
Please
Private Message
Pardon Me for Jumping In
Peeing My Pants
I Have Left The Chat
Parents are looking Over my Shoulder.
Parents Over The Shoulder - (I can't really talk)
People
Cutie
Are
Red and Gone
Hi Again!
Rolling On Floor Laughing
Rolling On The Floor, Peeing In My Pants
Rolling On The Floor (laughing is implied)
Rolling On The Floor Laughing My Arse Off
Real Soon Now
Read The Faq
Read The "Flippin" Manual
Read The Stupid Manual
aRe yoU?
Sorry All Close
Sweet Dreams
Same Here
Situation Normal, All "Fouled" Up
Significant Other
Sense Of Humor Failure
Shit Out Of Luck
Same Old S**t (stuff)
State Of The Art (latest technology)
Stupid Persons' Advertisement
Same Place, Same Time
Sorry
So Sorry
Same S**t, Different Day
Straight (can refer to sex, or DSTR8 as in Damn Straight)
Same To You
Search The Web
Sealed With A Kiss
Screaming With Laughter
Sincerely Yours
See You Later
See You Soon
That's All For Now
Take Care
Thank Goodness It's Friday
Thanks!
Thanks In Advance
Text Message
Too Much Info. (information)
'Til Next Time
Thinking Of You
That's Pretty Stupid
The Powers That Be
Tears Running Down My Face (laughter or saddness)
Tough S**t
Tough S**t For You
Ta Ta For Now
These Things Take Time
Talk To You Later
Thanks
Thank You
Take Your Time
Thank You, You Too
Thank You Very Much
You
You Suck
Unpleasant Visual
yoU're Welcome
Up Yours
Very Evil Grin
Welcome Back
WelCome
Well Done!
Wicked Evil Grin
What's Eating You?
Works For Me
What's In It For Me?
What The ...? or Who the ...?
Way To Go
Want To Go Private Chatroom?
What The Heck
What Would Jesus Do?
What You See Is What You Get
Yet Another Acronym
Yellow And Gone
You'll be Sorry
Young Lady
Yellow
Young Man
You're Mileage May Vary
Yea, Right. (sarcastic)
Yeah,..Sure,..Right
You're Very Welcome
You're Welcome

If you know of anymore that users may find useful, please us know.