A
A3Anytime, anywhere, anyplace
AAF As a matter of fact
AAK Asleep at keyboard
AAMOF As a matter of fact
AAMOI As a matter of interest
AAP Always a pleasure
AAR At any rate
AAS Alive and smiling
AASHTA As always, Sheldon has the answer (Bike mechanic Sheldon Brown)
AATK Always at the keyboard
ABT2 Meaning About to
ABTA Meaning Good-bye (signoff)
ACD ALT / CONTROL / DELETE
ACK Acknowledge
ADAD Another day, another dollar
ADD Address
ADDY Address
ADN Any day now
ADR Address
AEAP As early as possible
AFC Away from computer
AFAIK As far as I know
AFAP As far as possible
AFJ April Fool’s joke
AFK Away from keyboard
AFPOE A fresh pair of eyes
AIGHT Alright
AIR As I remember
AISB As it should be
AISB As I said before
AISI As I see it
AITR Adult in the room
AKA Also known as
ALCON All concerned
AML All my love
AOM Age of majority
AOM Age of Mythology (online gaming)
AOTA All of the above
AOYP Angel on your pillow
APAC All praise and credit
AQAP As quick (or quiet) as possible
ASAP As soon as possible
A/S/L Age/sex/location
ASL Age/sex/location
ASLA Age/sex/location/availability
ATAt your terminal
ATEOTDAt the end of the day
ATM At the moment
ATSITS All the stars in the sky
ATSL Along the same line (or lines)
AWC After awhile crocodile
AWOL Away without leaving
AYDY Are you done yet?
AYEC At your earliest convenience
AYOR At your own risk
AYSOS Are you stupid or something?
AYT Are you there?
AYTMTB And you’re telling me this because
AYV Are you vertical?
AZN Asian

B
B Back
B8 Bait (person teased or joked with, or under-aged person/teen)
B/F Boyfriend
B/G Background (personal information request)
B4Before
B4N Bye for now
BAG Busting a gut
BAK Back at keyboard
BAS Big ‘butt’ smile
BAU Business as usual
BAY Back at ya
BBBe back
BBCBig bad challenge
BBIAF Be back in a few
BBIAM Be back in a minute
BBIAS Be back in a sec
BBL Be back later
BBN Bye, bye now
BBQ Barbeque, "Ownage", shooting score/frag (online gaming)
BBS Be back soon
BBT Be back tomorrow
BCBecause
B/CBecause
BCBe cool
BCNU Be seeing you
BCOS Because
BD Big deal
BDN Big darn number
BENBig evil grin
BFBoyfriend
BFAWBest friend at work
BFBest friend
BFFBest friends forever
BFFLBest friends for life
BFD Big freaking deal
BFG Big freaking grin
BFFN Best friend for now
BFN Bye for now
BGBig grin
BGWM Be gentle with me
BHL8 Be home late
BIB Boss is back
BIBO Beer in, beer out
BIF Before I forget
BIL Brother in law
BION Believe it or not
BIOYN Blow it out your nose
BISFLATM Boy, I sure feel like a turquoise monkey! (unverified)
BLNT Better luck next time
BM Bite me
BM&Y Between me and you
BOL Best of luck
BOLO Be on the look out
BOOMS Bored out of my skull
BOYF Boyfriend
BPLM Big person little mind
BRB Be right back
BRD Bored
BRT Be right there
BT Bite this
BTA But then again
BTDT Been there, done that
BTW By the way
BUBU Slang term for the most beautiful of women
BWL Bursting with laughter
BYOB Bring your own beer
BYOC Bring your own computer
BYOP Bring your own paint (paintball)

C
C&G Chuckle & grin
CB Coffee break
CB Chat break
CB Crazy *biatch*
CD9 Code 9, Meaning "parents are around"
CIAO Good-bye (Italian word)
CICO Coffee in, coffee out
CID Crying in disgrace
CID Consider it done
CLAB Crying like a baby
CM Call me
CMAP Cover my a** partner (online gaming)
CMIIW Correct me if I’m wrong
CMON Come on
CNP Continued (in) next post
COB Close of business
COS Because
C/P Cross post
CP Chat post (or continue in IM)
CR8 Create
CRB Come right back
CRBT Crying really big tears
CRS Can’t remember stuff
CSG Chuckle, snicker, grin
CSL Can’t stop laughing
CSS Counter-Strike Source (online gaming)
CTC Care to chat?
CTHU Cracking the *heck* up
CUSee you too
CUSee you
CU2See you
CUA See you around
CUL See you later
CULA See you later alligator
CUL8R See you later
CWOT Complete waste of time
CWYL Chat with you later
CYA See you
CYAL8R See you later
CYE Check your e-mail
CYEP Close your eyes partner (online gaming)
CYO See you online

D
DBAU Doing business as usual
DD Dear (or Darling) daughter
DEGT Dear (or Darling) daughter
DF Don’t even go there
DGAF Don’t give a *freak*
DGTG Dear (or Darling) husband
DH Don’t go there girlfriend
DIIK Darned if I know
DIKU Do I know you?
DIS Did I say?
DKDC on’t know, don’t care
D/L Download
DLDownload
DLDown low
DLBBBDon’t let (the) bed bugs bite
DLTBBBDon’t let the bed bugs bite
DM Doesn’t matter
DN Down
d00d Dude
DP Display Picture (Yahoo Messenger Chat)
DPS Damage per second (online gaming)
DQMOT Don’t quote me on this
DS Dear (or Darling) son
DTS Don’t think so
DUPE Duplicate
DV8 Deviate
DW Dear (or Darling) wife
DWF Divorced white female
DWM Divorced white male
DYOR Do your own research (common stock market chat slang)

E
E Ecstasy
E1 Everyone
EBKAC Error between keyboard and chair
ED Erase display
EF4T Effort
EGEvil grin
EIPEditing in progress
EMA E-mail address
EMFBI Excuse me for butting in
EMSG E-mail message
ENUF Enough
EOD End of day
EOL End of life
EOM End of message
ES Erase screen
EVA Ever
EVO Evolution
EZY Easy

F
F Meaning female
F2F Face to face
F2T Free to talk
FBF Fat boy food (e.g. pizza, burgers, fries)
FBM Fine by me
FCFingers crossed
FFSFor ‘freak’ sakes
FICCL Frankly I couldn’t care a less
FIMH Forever in my heart
FISH First in, still here
FITB Fill in the blank
FOMC Falling off my chair
FOMCL Falling off my chair laughing
FRT For real though
FTBOMH From the bottom of my heart
FTW For the win
FUBAR Fouled up beyond all recognition
FUBB Fouled up beyond belief
FWIW For what it’s worth
FYEO For your eyes only
FYA For your amusement
FYI For your information

G
GGrin
GGiggle
G/F Girlfriend
G2CU Good to see you
G2G Got to go
G2R Got to run
G9Genius
GA Go ahead
GAL Get a life
GB Goodbye
GBU God bless you
GDR Grinning, ducking, and running
GD/R Grinning, ducking, and running
GFI Go for it
GF Girl friend
GFN Gone for now
GG Gotta Go
GG Good Game (online gaming)
GG Brother (Mandarin Chinese txt msgs)
GGP Got to go pee
GIAR Give it a rest
GIC Gift in crib (online gaming)
GIGO Garbage in, garbage out
GJ Good job
GLGood luck
GL/HF Good luck, have fun
GLNG Good luck next game
GMBA Giggling my butt off
GMTA Great minds think alike
GN Good night
GNSD Good night, sweet dreams
GOI Get over it
GOL Giggling out loud
GR8 Great
GRATZ Congratulations
GRL Girl
GR&D Grinning, running and ducking
GTGood try
GTFOGet the *freak* out
GTG Got to go
GTRM Going to read mail
GTSY Great (or good) to see you

H
HAU How about you?
H&K Hugs & kisses
H2CUS Hope to see you soon
H8Hate
HAGN Have a good night
HAGO Have a good one
HAND Have a nice day
HBHurry back
HFHave fun
HHIS Head hanging in shame
HOAS Hold on a second
HRU How are you?
HTH Hope this helps
HUB Head up butt
HVHave

I
IAC In any case
IAE In any event
IANAL I am not a lawyer
IBI’m back
IBI’m back
ICI see
ICAMI couldn’t agree more
ICBW It could be worse
ICEDI I can’t even discuss it
IDK I don’t know
IDTS I don’t think so
IDUNNO I don’t know
IG2R I got to run
IGN I (I’ve) got nothing
IGP I got to (go) pee
IIRC If I remember correctly
IK I know
IKR I know, right?
ILBL8 I’ll be late
ILU I love you
ILUM I love you man
ILY I love you
IMInstant message
IMAOIn my arrogant opinion
IMHO In my humble opinion
ImL (in Arial font) Means I love you (a way of using the American sign language in text)
IMNSHO In my not so humble opinion
IMO In my opinion
IMS I am sorry
IMSB I am so bored
IMTM I am the man
IMU I miss u (you)
INAL I’m not a lawyer
IOMH In over my head
IOW In other words
IRL In real life
IRMC I rest my case
ISLY I still love you
ITYK I thought you knew
IUSS If you say so
IWALU I will always love you
IYKWIM If you know what I mean
IYO In your opinion
IYSS If you say so

J
j00 You
j00r Your
JAC Just a sec
JAM Just a minutes
JFF Just for fun
JIC Just in case
JJA Just joking around
JKJust kidding
JMO Just my opinion
JPJust playing
JTLYKJust to let you know
JWJust wondering

K
K Okay
K8T Katie
k/b Keyboard
KBKeyboard
KBKick butt (online gaming)
KEWLCool
KEYAI will key you later
KEYMEKey me when you get in
KFYKiss for you
KISS Keep it simple, stupid
KIT Keep in touch
KOC Kiss on cheek
KOL Kiss on lips
KOTC Kiss on the cheek
KOTL Kis
References :
http://www.webopedia.com/quick_ref/textmessageabbreviations.asp
hoped it helped )