Definitions by bodythunder
Keister Stash
Keister Stash by bodythunder December 14, 2008
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.
Upper Decker by bodythunder December 9, 2008