Muff Master 

A very smart, or intelligent person, much more than people normally are, yet are at particular times they become very inept or foolish at other everyday things.

Kim is such a muff master, she is very intelligent, yet at times makes really silly mistakes.

Muff Master by Byrappa September 25, 2013

muff masher

a man who slams his fist, head, or genitals into the vagina of an unsuspecting female

Jon was a muff masher as he rammed his head into her cooch

muff masher by Someonecreepy December 21, 2008

Muffmaster 

A person who is highly skilled at the art of cunnilingus.

Andrea gets pissed off with her boyfriend all the time but never breaks up with him. He must be a muffmaster!

Muffmaster by Chad Apollo September 29, 2017