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4.
Doing whatever; going O.D.
Yo every day we be illin.
by Flame777 October 07, 2010
 
1.
going crazy/buggin
You know the moon isnt green are you illin!?!?
by Soledad July 23, 2003
 
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
 
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
 
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
 
6.
Remarkable, outstanding, astonishment
Dude.. them jeans be illin'
by The Chow Man October 21, 2004
 
7.
The act of hatin on somebody.

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