futt butt 

bastardized verison of the insult "fuck butt"

i cant believe you've done that, you.. you.. futt butt!

futt butt by stereohigh21 July 12, 2009

butt-futt 

To pull down your pants and bare ass fart directly into somebody's face.

Yo Francois, David just butt-futted me so fucking hard I saw his butt cheeks vibrate.

butt-futt by jasparagus January 9, 2021