look up any word, like bukkake:
 
1.
When you suffocate someone using your nutsack. (Picture the way a small child looks when they put a plastic bag over their head and breath in.)
If that bitch/ screaming child doesn't shut up, I'm gonna give her/it sack mouth.
by Snake Mittens January 30, 2010
 
2.
a person that constantly has sack (scrotum) up close to their mouth
Owen, Mike D, Mike K
by Billy Madison April 01, 2005