Upper Decker

A toilet prank, whereby someone defecates in the refill tank (water closet), causing each additional flush to deliver brown, poopy water into the bowl.

Jim was being such a jerk at his party, so I went upstairs to his bathroom and dropped an upper decker in his toilet.

by bodythunder December 09, 2008

Keister Stash

In prison, the act of concealing objects in your anus or in the crack of your ass.

-Yo, Bill. How did you get those cigarettes in here, man?-

-I keister stashed 'em, dude.-

by bodythunder December 14, 2008