look up any word, like plopping:
 
1.
Someone who is capable of talking but always seems to choose not to.
Look at that guy in the corner, what a muter.
by Makutu August 04, 2005
 
2.
One who commutes to a college or university.
"Hey, those muters are totally not as cool as us rezzies."
by Matt Kerstetter November 19, 2006