butt zombie 

A fart that makes a really load roaring noise.

The long silence was broken by Jazmin's angry butt zombie.

butt zombie by jazmin blessed January 13, 2009

Zombie Butt 

When your farts smell like you have been eating nothing but dead things.

For God's sake, Grandpa has straight Zombie Butt after eating nothing but Cheetos and cabbage!

Zombie Butt by Skiddy Marx April 26, 2019