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 31, 2010
Get the Sack Mouth mug.
*kids smoking joint.*

*teacher walks in.*

student: "oh, sack in my mouth!"
by Sagan Hater October 12, 2014
Get the Sack in my mouth mug.