Mouth breather 

A person who's so unbelievably dumb, they couldn't even be bothered to breathe through their nose. To put it simply, mouth breather is another word for an idiot.

"That guy, *name here* is nothing but an inconsiderate, close-minded mouth breather!"

Mouth breather by Suburbanz71 February 17, 2021

mouth-breather 

1. Someone who is incapable of breathing through their nose

2. Someone stupid who is unaware that their mouth is gaping open, often taking in gallons of air and spewing their own dry, bacteria rotten maw into your clean air in your vicinity.

Never let a mouth-breather speak to you very close, or you might regret it.

mouth-breather by Randall Wynn April 13, 2008

mouth-breather 

The only thing these crude, rude, and obnoxious people have in common with the human species is that they have a hole in their head with which they breath; otherwise, they are pretty much amoebas with vocal chords.

check your local pool hall in any small southern town

mouth-breather by lee ann hansen January 6, 2004

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

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 

1. A moron from a low social caste. Picture someone with a sunken forehead, low hairline, and prominent chin.

2. A guy who goes to the gym seven days a week, probably does steroids, and has a body that looks like a comic-book character. He might be 5'4" but his arms and shoulders are so overbuilt that he looks ridiculous.

If you go to Gold's Gym in the afternoon there are nothing but mouth-breathers.

mouth-breather by phuckie July 14, 2007

Mouth-breather 

1. Someone who can’t breathe through their nose.
2 A stupid or ignorant person
3. Someone who refuses to wear a mask for political reasons.

4. All of the above (most common)

That Trump-lovin’ gun-totin’ fool is one heckuva mouth-breather.

Mouth-breather by The Smose August 9, 2020