Mouth Breather

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

Mouth Breather

In Eleven's opinion, its someone who is very annoying

She's such a mouth breather

by PotterPirate15 November 10, 2020

mouth-breather

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

Open Mouth Breather

Open Mouth Breather - An individual that breathes through their mouth when not exerted. The individual appears to be, and ususally is, perpetually confused, not very bright, an idiot.

You see someone from Wisconsin driving along. As you pass them you see their profile and their mouth is wide open, an Open Mouth Breather. Although they are looking straight ahead, they don't see traffic stopping and slam their brakes on at the last moment. This is an example of an OMB (Open Mouth Breather)

by Nicholas Esayian October 17, 2007

Open-Mouth Breather

Someone who keeps their mouth open, often with tongue sticking out; appearing mentally deficient. Implying the person has brain damage or is mentally deficient.

All his friends were idiots and morons; the biggest collection of open-mouth breathers I've ever seen.

by Timbotron3000 May 28, 2006

Open-Mouthed Breather

Someone who keeps their mouth open, often with tongue sticking out; appearing mentally deficient. Implying the person has brain damage or is mentally deficient.

All his friends were idiots and morons; the biggest collection of open-mouthed breathers I've ever seen.

by Timbotron3000 May 28, 2006

Mouth Breather

An extremely stupid person, often referring to a person with Down syndrome (a retarded person)

1. That kid Ross has Down syndrome, he is a total mouth breather
2. Do you breath of of that mouth bud?!?!

by Donstar3 May 31, 2017