Doing whatever; going O.D.
Yo every day we be illin.
by Flame777 October 07, 2010

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Top Definition
going crazy/buggin
You know the moon isnt green are you illin!?!?
by Soledad July 23, 2003

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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

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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

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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

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Remarkable, outstanding, astonishment
Dude.. them jeans be illin'
by The Chow Man October 21, 2004

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to be acting lame.

usually a pretty dope person acting totally whack.

something a hater does.
Dirty Dan: BababaBiyatch, hows it crackin baby bizzle?
Charisse: Shut the fuck up; you be illin' douche packer.
by Ambassador-C May 24, 2008

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