gappin mule 

A Gappin Mule is When a Man is Fucking A Donkey in the ass and his wife, girlfriend or whore is getting it from the Donkey.

Gappin mule if u Want a Example Got Fuck A Donkey Srry I DOnt Wanna

gappin mule by Eric W. The Destroyer Of Asses(NOT MEN) August 18, 2006