A sponge butt is a big ass butt that soaks up a fuckton of shit and provides amble padding for extended periods of sitting. Also, may produce thunder like farting
by Syralee February 20, 2017

by JohnToaster December 3, 2011

by PatRajJames July 29, 2023

Damn, Jeff is such a fun sponge. Hw won't even let me fuck his sister.
At first I thought you were cool but you ended up being a fun sponge.
At first I thought you were cool but you ended up being a fun sponge.
by Sedia Bonsu December 16, 2007

by matt March 7, 2004

Sponge fucking is where you get a lot of seamen and soak it up with a sponge, then squeeze it out inside a vagina as a way of artificial insemination
by civeret August 17, 2010

a seemingly easy sexual maneuver in which 4-8 men ejaculate onto a womens head. she then rings the remainder of ejaculate out of her hair as if it were a sponge
by Corshanomics November 1, 2010
