Abbreviations:

Text message shorthand(language on page could be upsetting): http://www.netlingo.com/acronyms.php
Text messaging and online chat abbreviations(language on page could be upsetting): http://www.webopedia.com/quick_ref/textmessageabbreviations.asp

AFK Away from keyboard

ANOYN Annoying

A/S/L? Age, sex, location

B4 Before

B4N Bye for now

BBL Be back later

BF Boyfriend

<BS> Big smile

BTDT Been there done that

BWL Bursting with laughter

CS Can’t say; Cyber sex

CTN Can’t talk now

CUL See you later

CYO See you online

DIKU Do I know you?

D8 Date

F2F Face to face

FC Fingers crossed

FETCH Cool

FOMCL Falling off my chair laughing

GAL Get a life

GF Girlfriend

GFI Go for it

GFN Gone for now

GOI Get over it

GOL Giggling out loud

GRR Angry

GTG Got to go

H&K Hug & kiss

HAMRD Hammered

IDK I don’t/didn’t know

ILU I love you

I12CU I want to see you

IOH I’m out of here

458 I love you

IRL In real life

JK Just kidding

K Okay

KOL Kiss on lips

KWIM Know what I mean?

L@U Laughing at you

L8r Later

LD Later, dude

LDR Long distance relationship

LMIRL Let’s meet in real life

LMK Let me know

M8Ts Buddies

LMSO Laughing my socks off

LOL Laughing out loud

LTNS Long term relationship

MUSM Miss you so much

NBD No big deal

NP Nosy parents

NRN No reply necessary

OIC Oh I see

OLL Online love

OM Boyfriend

P911 My parents are coming!

PA Parent alert

PAL Parents are listening

PANB Parents are nearby

PAW Parents are watching

PDA Public display of affection

PIC Do you have a picture?

PM Private message

POS Parents over shoulder

RENTS Parents

RBTL Read between the lines

RL Real life

ROTFL Rolling on the floor laughing

RPG Role playing games

RUF2C Are you free to chat?

RUF2T Are you free to talk?

RUOK Are you OK?

SORG Straight or gay?

TA Teacher alert

TAFN That’s all for now

TAW Teachers are watching

TIGHT Nice; cute; hot

TLK2UL8R. Talk to you later

TMI Too much information

TOY Thinking of you

TWFW Too weird for words

TXTME Text me

WTGP Want to go private?

WUF Where are you from?