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12.
Doing stuff you shouldn't be doing (aka bad shit) while hanging out with friends, like drugs or vandalism.
Donna: "What are the plans for tonight, Fred?"
Fred: "Oh Hangin', Chillin'.... Little bit a illin."
by Shannie January 04, 2006
91 131
 
1.
going crazy/buggin
You know the moon isnt green are you illin!?!?
by Soledad July 23, 2003
451 235
 
2.
A word used to describe something that is both "sick" (amazing) and "chilling" (relaxed). Synonomous with "epic" and "legendary" although with a somewhat more relaxed connotaion.
Yo brosif, that headshot was straight illin like a villain yo!
by CandyMan77 March 25, 2009
272 135
 
3.
1) Trippin', acting erratically or inappropriately.
or
2) Having fun, or messing around.
1) My parole office is usually cool, but he started illin' when I told him I was back to shooting heroin and pimpin' hos.

2) Me and my boys was just sitting around illin'...
by buddhablaze January 28, 2003
125 24
 
4.
Doing whatever; going O.D.
Yo every day we be illin.
by Flame777 October 07, 2010
36 49
 
5.
Something pirates and theives and beastie boys do well and often.
"Most illinest b-boy - I got that feeling
I am most ill and I'm rhymin' and stealin'

by jim December 21, 2005
98 122
 
6.
Remarkable, outstanding, astonishment
Dude.. them jeans be illin'
by The Chow Man October 21, 2004
27 54
 
7.
The act of hatin on somebody.

Shaniqua was illin' me for dressin better than her.
by Aramel November 17, 2008
4 32