Doofknuckle 

A different and funny equivalent as dumb ass

I can't stand that Doofknuckle.

Doofknuckle by Roknmetal December 20, 2016

Boofknuckle 

Camel toe, with saggy drapes creating lifted appearance through the pants.

That girls boofknuckle was straight poppin seams.

Boofknuckle by Camel creeper October 15, 2020