There are so many different acronyms to chat with it is hard to keep up with. The few I know are

BRB- be right back

ROFL- rolling on the floor laughing

LMAO- laughing my a** off

BTW- by the way

WTF- what the f**k

H&K- hug and kiss

OMG- oh my god

IGP- i got to pee

TTYL- talk to you later

HUB- head up butt

CYA- see ya

IC- I see

JK- just kidding

L8R- later

MTF- more to follow

PPL- people

PITA- pain in the a**

POS- piece of SH*T

TMI- too much info

TY- thanki you

TTFN-ta ta for now

WTG- way to go

YW- your welcome

WB- welcome back

Here is a site that will help you with most of the others. http://www.enter.net/~jtmaru/misc/chlingo.html

though i know there are many more. the ones that are made to trick parents are scary. Such as

ROS- rents over shoulder

W2M- want to meet

PAW- parents are watching

PCM- please call me

Here is another site to help you decipher the code

http://www.abbreviations.com/acronyms/CHAT

Here is where i get to caution everyone (like they have never heard it before), not everyone is who they say they are. Do you put all your info on the net? You shouldn't You do not have to lie but you do not have to add it in either. A lot of people i know in person use a pen name to protect themselves from identity theft and would be murderers.

I personally prefer to type it all out if possible. Now in a crunch i write short hand. Then again i do the same thing when i write on paper. Less cramps that way and less space.