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.
#stupid #idiot #mouth breather #moron #tool
von Randomus 25. August 2006
Adj: - derogative term - Someone of a lower (or no) class – Usually found in large packs in city centres – can be of any age (although motherhood stats at 14) – standard attire – Tracksuit bottoms – fake Burberry caps – jewellery from Elisabeth Duke of Argos. Derived from the fact they breathe through there mouths.
1; the mouth breathers stood in the dole queue.
2; the mouth breathers considered Primark to be an expensive shop.
3; the mouth breathers were unfamiliar with the concept of books or chewing with ones mouth closed.
von Andy The Great 21. Juli 2003
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?
#mouthbreather #cretin #itv2 #nuggets #ribena #stella
von sugarcoatedGandhiman 10. Februar 2011
A person of inferior intellect that lacks the faculties to recognize he is breathing heavily through his drooping open mouth; one who watches Fox News and Nascar with religious zeal.
Donnie shops at Evil-Mart like all the other mouth breathers.
#moron #tard #fucktwit #idiot #dolt
von Joe Flood 4. September 2007
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
von lee ann hansen 6. Januar 2004
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.
von Mhuur 25. November 2002
A mechanical engineer who is much inferior to their counterpart the electrical engineer. Often found staring at a machine with mouth agape breathing through their mouth in a stupid manner and blank expression on their face wondering why the machine will not work. Luckily an electrical engineer is never far away to save the day for the mouth breather.
Hey Joe check out the mouth breather staring at the labeler like an idiot. Do you think I should go help him out?
#mechanical engineer #idiot #moron #dope #stupid
von CitadelBulldog96 11. Dezember 2009
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