Mouth Breather 

A mechanical engineer who is much inferior to their counterpart the electrical engineer. Often found staring at a machine with mouth agape breathing through their mouth in a stupid manner and blank expression on their face wondering why the machine will not work. Luckily an electrical engineer is never far away to save the day for the mouth breather.

Hey Joe check out the mouth breather staring at the labeler like an idiot. Do you think I should go help him out?

Mouth Breather by CitadelBulldog96 December 11, 2009

Mouth Breather 

In Eleven's opinion, its someone who is very annoying

She's such a mouth breather

Mouth Breather by PotterPirate15 November 9, 2020

Mouth Breather 

An extremely stupid person, often referring to a person with Down syndrome (a retarded person)

1. That kid Ross has Down syndrome, he is a total mouth breather
2. Do you breath of of that mouth bud?!?!

Mouth Breather by Donstar3 May 31, 2017

Mouth Breather 

One who doesn't know how to breathe through their damn nose, causing them to constantly pant like dogs.

"Dude, Steve is such a fucking mouth breather"

Mouth Breather by Asm0deus July 6, 2017

mouth breather 

Simon Snow.

Wow, he’s so cute, must be a mouth breather...

mouth breather by spicy stinger November 19, 2017

Mouth breather 

A person who without hesitation wil tell on you or someone who gossips too much and wont keep their mouth shut

You know the feds will be at your door if bob knows what you're doing, he's a mouth breather.

Mouth breather by Squig9669 May 5, 2018

Mouth breather 

A person who dosent understand; stupid; dumb; etc

"That person is a mouth breather."
"Ugh, you're such a mouth breather."

Mouth breather by DEMOGORGAN October 1, 2018