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

Subhuman Mouthbreathing Troglodyte 

anyone who supports unregulated capitalism

A worrisome amount of Republicans have become Subhuman Mouthbreathing Troglodytes

Subhuman Mouthbreathing Troglodyte by DrPattyB September 16, 2020

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

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

mouth breather 

A sun smilin' mouth-breather.

One who can't look towards the sun without squinting, showing their upper teeth and dropping their mouth open.
Usually wears a Cleveland Browns shirt.

"Hey look at that sun smilin' mouth breather, I sure hope a cloud blocks out that sun before he drools all over himself."

mouth breather by F.R. January 7, 2005

mouth-breather 

Complete dumbass that finds it difficult to even breathe.

Matt Kulow

mouth-breather by fartknocker4 August 11, 2003