mouth jerk

In the Nordic highlands, it was widely though to be rude when prince's of lords would pick their teeth with their fingers in a jerking motion, while speaking ill of their house.

This custom was adopted by the Europeans in the 1600's

When your son is mouthing off, when he should be zipin' the lip. He's being a mouth jerk

by Laythem December 13, 2012

Jerking your mouth off

When all someone does is talk shit and the more they do the more toxic waste comes out.

Guy: I can't stand John Walsh. All he does is talk about fugitives being on the loose! He needs to get a life!

Girl: Quit jerking your mouth off. I can smell the shit when you open it.

by Luna Belle December 11, 2009