Definitions by Fayth.

matass 

The fat lead singer of the alternative rock band, Kill Hannah, Mat Devine. Also a very bad insult for somebody of the overweight/obese class.

"You stupid matass, you're fatter than that singer of the greatest band of all time!"
<br>"Gerard Way?"
<br>"Mat Devine!"

matass by Fayth. February 9, 2008