22
Someone who's been in too many fistfights and thus has had the ability to breathe through the nose beaten out of him. The usual implication is that the ability to use the brain has also been beaten out of him.
My bookie sent a mouth breather to collect for him, but when the goon tried to get me to head to the ATM with him I escaped for the moment by saying his shoe was untied.
by Rockford Files March 29, 2005
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Golden Shower Plush

He's warmer than you think.

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23
a fat person who cant breath through their nose because walking is too much excercise for them
terrence you're such a mouthbreather!
by bobbypoo May 24, 2005
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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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24
Derogatory. Special species of fanboy dork who breathes through his mouth. When not collecting funny books, watching cartoons, playing dungeons and dragons, or video games, he is stalking goth girls or getting beat up.
The pimply faced mouthbreather with coke bottle glasses crept into the comic bookstore. He watched the goth girl for 5 minutes before he walked up and said to her, "Gee, (weez, weez, weez) you remind me of Electra from the X-Men funny books...(weez, weez, pant)
by Jerry Bathers January 21, 2006
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Dirty Sanchez Plush

It does not matter how you do it. It's a Fecal Mustache.

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25
A person who breathes loudly through their mouth with a nasally voice. Generally seen playing Dungeons and Dragons in the school library and looking at pictures of naked anime women in the computer labs.
Studies indicate that mouth breathers also have loud obnoxious laughter.
The ugly guy with the long red hair who is taking an arts degree but likes to pretend he's in Computer Science.
by Ace October 13, 2004
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Dirty Sanchez Plush

It does not matter how you do it. It's a Fecal Mustache.

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26
Those mouth breathers will believe anything Rush Limbaugh says.
by The Polish Parrothead August 12, 2009
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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27
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?
by CitadelBulldog96 December 11, 2009
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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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28
Someone incapable of breathing out their nose because their mouth is always yapping. They can often be seen in forums where they're assumed to be clever. However, assumptions usually land you in jail.
Kia salespeople=everybody at Kia, involved with Kia or even knows about Kia is a mouth-breather.
by am_rockstar December 22, 2005
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Donkey Punch Plush

10" high plush doll.

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