mouth-breather
n.— «“How can we reach out to the average viewer?” You know…the middle-class mouth-breather with the camper truck and the short attention span.» —“Mary Shelley, Mary Shelley” by Cyra McFadden New York Times Mag. Feb. 5, 1978. (source: Double-Tongued Dictionary)
Further reading
It’s hard to imagine now, but there was a time when people disagreed over the best word to use when answering the phone. Alexander Graham Bell suggested answering with ahoy! but Thomas Edison was partial to hello! A fascinating new book about...