Mouthbreather 

1. Someone who is really dumb
2. A person who doesn't/can't breathe through their nose

(The word mouthbreather is also used in Stranger Things)

Mouthbreather by A-Claire February 20, 2017

mouthbreather 

1. literally, someone who lacks enough intelligence that they never learned to breathe through their nose.

2. a really dumb person.

In his latest work, the director has forsaken the indie audience and made something for the mouthbreathers.

mouthbreather by hedgerow September 3, 2003

Dutch Mouthbreather 

When someone uses their mouth to inhale gaseous fecal particulate from partners chocolate starfish.

Remi is truly a Dutch Mouthbreather sommelier - he picked up hints of white truffle and corn from my fart.

Dutch Mouthbreather by Buford C Cabhash April 22, 2022

Mouthbreather 

The word Eleven in Stranger Things uses to call someone a Bullshitter.

'Mouthbreather'

Mouthbreather by Strangest Things December 29, 2018

mouthbreather 

someone who is ignorant to the social courtesies of public movement. consequently, they stifle the mobility of thinking humans by becoming an obstacle which must be negotiated. they can be identified by their despondent facial expressions and wide-open mouths .

Man, I wish these mouthbreathers would get out of my f**king way! I hate people who don't pay attention to where they are going.

mouthbreather by dee eye zee December 22, 2008

Mouthbreather 

Draymond Green

Draymond Green's mouth is opening 24/7 cause he a mouthbreather.

Mouthbreather by Kevin Duran Duran April 30, 2019

mouthbreather 

A person of low intellect who is incapable of critical thinking. A mouthbreather watches Fox News religiously and believes everything they hear there as well as anything on the Internet that validates their ignorance.

Donald Trump appeals to every mouthbreather in the country because he is as ignorant and unimaginative as they are.

mouthbreather by SheckyGrl January 17, 2016