Mucker butt 

A Mucker butt is a flat ass that one usually sees on Native American females.....

Looks at Carmela, She has a mucker butt.If it was any flatter, it could be used for drawing a straight line

Mucker butt by Seth Mythrax January 12, 2019

butt mucher 

similar to a scrotem licker but does not lick.... thus munches

2. someone who eats out the anal area

1. that got damned butt mucher ate a whole in ma damn trousers

2. that god damned devil woman decided to go all kinky on meh and tried to be a damned butt mucher

butt mucher by Gladiss, Charleh, And Fraink August 13, 2005