butthole muscle

An unintelligent moron, can also be used to refer to an annoying dimwit that is uninformed on a particular subject or topic.

I tried discussing the economy with him, but he was being a real butthole muscle about it.

by Sergeant Dornan September 15, 2015

butter muscle

A penis incapable of achieving erection due to the over consumption of alcohol and/or meat (ribs).

"Hey dude did you score with Sally last night?"
"Nah bro, I got the butter muscle"

by KCMOMAN September 24, 2012