on-it 

to be under the influence of methamphetamine.

"Did you see the cloud Mike blew out, he's gonna be on-it!"

on-it by Blarrgh December 12, 2008

on it 

"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."

on it by Diego July 18, 2003

on it 

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

on it by miaraaa November 21, 2010

on it 

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?

on it by Ohohoho July 10, 2010

on it 

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)

on it by ObsessiveG August 12, 2007

on it 

Feeling horny; actively pursuing someone of the opposite gender.

"Joe is on it tonight"

on it by A February 18, 2007

on it 

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

i'm on it

on it by scoper1141 April 30, 2010