1. Something you have hidden up your ass. Most of the time when your hiding it from authority. After you keestered something, whats in your ass is your ass stash
Example: Prisoner #1-You still got that ass stash?
Prisoner #2-Yeah, I keestered that shit. We got some weed for later.
Prisoner #2-Yeah, I keestered that shit. We got some weed for later.
by keestermaster February 10, 2010