A liquid used to clean one's mouth.

(slang, derogatory) Overly talkative, insolent, and loud. / Of a dog: inclined to bite or nip.

(zoology) Any animal that cares for its offspring, either eggs or juveniles, by holding them in its mouth for extended periods of time.

The process of breathing through the mouth.

(derogatory, slang) unintelligent, especially when not aware of this

That is pleasing to the sense of taste; appetizing. / (by extension) Enticing or tantalizing.

Alternative spelling of mouth breather

plural of mouthbreather

plural of mouthguard

(usually in the plural) An appendage-like structure on the outside of an insect's or other arthropod's mouth, serving to manipulate and masticate food.