"I'm on it." means 'I have it covered' or 'I will do it very shortly'.
"Yeah, don't worry dude, I'm on it."
by Diego July 18, 2003
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to be kind of in a relationship with a guy/girl, but not fully committed any MAYBE not exclusive/monogomous. baically you like eachother and are sexually active, but dont call eachother girlfriend and boyfriend
people who hate committment should be on it-eg teenag boys
girl:i saw you kissing with adam before, are you going out now?

girl2: nah, we're he's not my boyfriend, we're just on it, innit, just link whenever
by miaraaa November 18, 2010
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If someone is "on it" they are trying to get with, or are already dating, a member of the opposite sex.
I saw you with some chick in town yesterday. Are you on it?
by Ohohoho July 9, 2010
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if your want to do something or if you like someone you would say oh im on that.
u go n meet girls n 1 boy asks the other "are u on her" (do u like her)
or
u wanna go 2 a football match and u ask sum1 "Are u on it" (do you want to do that)
by ObsessiveG August 10, 2007
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Feeling horny; actively pursuing someone of the opposite gender.
"Joe is on it tonight"
by A February 22, 2005
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commonly used term amongst 16-25 year olds for consuming alcohol at a heavily excessive rate

"it" means an alcoholic beverage and "on" meaning consuming excessively
by scoper1141 April 29, 2010
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describes a persons feelings while under the influence of Meth.
Yo, did you guys see Moses after is got done smoking, he's "ON IT"!
by Rukee Ruc March 17, 2008
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