1 definition by Frontside UpperDecker

Frontside

When you sit reverse or backwards on the toilet and take a dump, or masturbate.

Dude, how did you leave skidmarks on that part of the toilet, were you sitting frontside?
I was definitely frontsiding that shit!
I frontsided the shit out of my neighbors toilet!

by Frontside UpperDecker November 21, 2012