Doing stuff you shouldn't be doing (aka bad shit) while hanging out with friends, like drugs or vandalism.
by Shannie January 5, 2006

by Coral Fang December 5, 2003

by FTCW May 16, 2003

illin is chillin like a villain.
john:whats up nigga
jamie:nothin g-unit, im fuckin illin with a mack 10 and a 4 pound blunt, represent.
jamie:nothin g-unit, im fuckin illin with a mack 10 and a 4 pound blunt, represent.
by Brendan Brown December 14, 2003

Partaking in an activity which authorities would class as being no good. Range of illin activies are numerous and cover a wide spectrum of "offences" from loitering to smoking an L or casing a joint.
by Mack'N November 1, 2005

by wldchild July 23, 2003
