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Being ready to or engaging in criminal behavior. Also referred to as "On butt".

Mostly used in some low-income neighborhoods and communites.
"Wow, he just shot that guy. He's on ass!"
by WasHanin April 17, 2014
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Oct 3 Word of the Day
I couldn’t care less (but one must keep up appearances, right?)
Frenemy has a family tragedy. "Thoughts and prayers."
by November 05, 2018
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