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A language spoken mainly in writing which shortens English words and phrases into catchy, yet hard to interpret abbreviations and misspellings. These are used on AIM to save .4 seconds of typing.
Examples of AIM Lingo:

Got to go- g2g or gtg
I love you- ilu
Laughing out loud- lol
Oh my god-omg
to, too: 2

Need I say anymore?
by Teh real DM January 06, 2006