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.
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.
by Mover March 21, 2004

by TFE February 20, 2007

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.
by Mhuur November 25, 2002

The most nasty ass person of all times, there a slut and a hoe bag they grab your dick and breathe all over u so watch out before rebecca comes to grab your dick
by Quandale_dingle the 3rd June 1, 2022

by greenhairedturtle May 26, 2018

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.
by TInaJack February 26, 2018

by chillintough January 28, 2020
