look up any word, like demisexual:
 
1.
Totally cool, delicious, great.
That dessert was sick-ass.
by Suz January 19, 2004
 
2.
adjective that can mean really awesome, totally wack, or extremely disgusting.
You sickass monkey.

I downloaded this totally sickass song
by Jennifer March 13, 2004
 
3.
1. Verb: A depraved act in which one extends his or her middle finger, dips it in mixture of lemon juice, hot sauce and Borax brand powdered bleach, rolls it in broken glass, and shoves it violently into the victim's asshole. Preferably while they sleep.
Joya wouldn't shut up about the windshield on her car, so I snuck into her house at 2am and slipped her The Sickass.
by Joe_M2 August 30, 2006
 
4.
gross or otherwise wrong
They need to stop playing that sick ass Kid Rock music on the radio.
by girl from sacto July 24, 2001