mouth breather 

Someone who breaths out of there mouth because they have a deviated ceptum or there nose is messed up

Connor and Ben are mouth breathing lards and are huge mouth breathers

mouth breather by Preme team November 7, 2017

Mouth Breather 

A subspecies of Homo-sapiens known for their lack of any intelligence whatsoever. Their young are raised entirely on a diet of Ribena and Chicken Nuggets, whilst the adults have no interests other than Stella Artois and ITV2.

Dude, did that mouth breather just trip over his own foot?

Mouth Breather by sugarcoatedGandhiman February 27, 2011

Mouth Breather 

Any person who is so stupid that they don't have the ability to breathe out of their nose.

A person who cannot cut over a 35 on their ASVAB.

Somebody who's lower lip is so big that it can be caught on a trip wire due to the over breathing through the only orifice they know how to breathe out of.

Mike isn't quite a Glass Licker, however we'll give him the status of Mouth Breather because he got a 25 on his ASVAB.

Josh is a Mouth Breather. His girlfriend, who's been sleeping around with half of the state, has him fooled into believing they will get married.

Josh says he gets 5,000 dollars a month hauling milk... what a mouth breather.

Mouth Breather by Randomus August 25, 2006

mouth-breather 

1. A term used by intolerant people or by the elite, who find some need, probably from a lack of self esteem, to marginalize someone whose opinion differs from their own. Usually they would define a mouth breather as someone who is to stupid to "get it". A a socially backward individual.

2. Someone who suffers from allergies or other condition that prevents breathing through the nose.

These days, someone who supports President Bush or the NRA, would be described by liberals as a mouth-breather.

mouth-breather by Mover March 21, 2004

Fire Breather 

Rather odd slang for a lesbian, paired with Laser Knee.

"Dude, I totally think that chick's a fire breather."
"Woahz!"

Fire Breather by TFE February 20, 2007

mouth-breather 

Any human being that breathes in and out through their mouths, often engaging in idiotic and useless activity. An affinity for sexually crude humour generally accompanies.

Most of the people posting definitions here are mouth-breathers.

mouth-breather by Mhuur November 25, 2002

Mouth breather 

Mouth breather was used by Jennifer Love Hewitt in Heartbreakers. She was annoyed with a guy who she considered a stupid idiot. It was later used sever times in Stranger Things.

You're a mouth breather.

Mouth breather by TInaJack February 26, 2018