jawmuncher 

A stupid person who turns out being smart.

That dude is a jawmuncher right there.

jawmuncher by John Scadlock June 17, 2006

jawmuncher 

A person who acts stupid but is really smart but only when it is needed.

Lets say Bob goes to school and steals some cafeteria food, pretty stupid. But when he takes his Algebra final he makes a 100. This would be a jawmuncher.

This word is commonly used in middle and high school when talking about a friend that does stupid things outside of school but is smart inside of school.

jawmuncher by Max June 18, 2006

Jawmuncher 

An idiot, or otherwise unintelligent person. A pratt.

He's a Jawmuncher

Jawmuncher by Anthony Hawk October 16, 2008

jawmuncher 

someone who's obsessed with dinosaurs

Person 1: Hey are you hyped for the new Dino Crisis game?
Person2: No, I'm not a jawmuncher

jawmuncher by ThePandorasBox August 28, 2018

Jewmuncher

A person, typically male, who hates Jews and wants to kill them at a rapid rate.

Jew: Oh No! The jewmunchers are coming!

Jewmuncher by DontJudgeEatFudge June 2, 2018