mouth-breather

listen to the pronunciation of mouth-breather
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Alternative spelling of mouth breather
A person who is boorish, stupid, or otherwise unattractive

She's a philosophy major from Brown, now working retail at Niagara Falls, living in a trailer and working for a mouth breather of a boss.

A person who routinely inhales and exhales through the mouth, instead of through the nose

Respirations cannot be recorded by this method, if the subject is a mouth breather (as no air flows by the thermistor in the nose).

mouthbreather
alternative spelling of mouth breather