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The combination of slack and chill.
May be used as a adjective or a verb.
Hey man whats up? Not much just slillin' at home drinking some beer and watching the game.

George never gets into any fights or overreacts, he is one slill dude!
by Slill dude October 01, 2009

Words related to Slill

chil chill penis slack slak slil slillin slilling
to suck a small penis
Matt got slilled by Jenny.
by Elena April 03, 2005