Nut Muffler 

An insulting reference to a goatee. It infers that the wearer of the goatee is a cock sucker. The addition of hair on the chin lowers the noise produced by ones testicles slapping on the chin.

Dude, that is a nice nut muffler you are growing there.

Nut Muffler by Geoffrey J. May 10, 2008

nut muffle

Any item that will catch a load while masturbating.

I was workin' it for a few minutes and before I came off I grabbed a sock- the perfect nut muffle.

nut muffle by the_paperboy September 24, 2013