Sackmouth 

a person that constantly has sack (scrotum) up close to their mouth

Owen, Mike D, Mike K

Sackmouth by Billy Madison April 1, 2005

sassmouth 

being smart and/or cheeky

when jflex talked back his mother used to say 'stop that sassmouth!'

sassmouth by t dogg September 21, 2005

backmouth 

refering to the anus or more generally the butt.

Peach likes it rough in the backmouth.

backmouth by gozer September 4, 2006

Sharkmouth

When you dont want to go somewhere but you need to

Bro1: Aww dude you need to go to Math during recess?
Bro2: yep, well into the sharkmouth cya later

Sharkmouth by Theodoren April 7, 2015

Sack Mouth

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.

Sack Mouth by Snake Mittens January 30, 2010

jackmouth 

A person who is in every measure, deficient, unsatisfactory, or incompetent

Denver Broncos QB Jake Plummer is a complete jackmouth

jackmouth by Ricky August 19, 2004

skankmouth 

a condition of the female body in which causes the mind and or mouth wanting to give fellatio to any man they see.

"My dude! Dana hella got that skankmouth!"

"Yea all sorts of balls been on her chin."

skankmouth by Zakk White October 19, 2008