Wiktionary
mouth-breather
n. (alternative spelling of mouth breather English)
Usage examples of "mouth-breather".
He was a real mouth-breather, this lurker-gargantuan, beet-faced, with semipunk shaved head.
I wasn't worried about that particularly, but I wasn't keen on exposing myself and my family to assault and battery by the mouth-breathers who performed certain tasks for Hizzoner.
He wasn't a mouth-breather, not the kind of jerk always hopping along on his erection as if it were a pogo stick.