Someone who plays any of the instruments called a mouth organ (panpipes, Jew's harp, harmonica).

plural of mouth harpist

Someone who plays a mouth harp (either a harmonica or a Jew's harp).

Alternative spelling of poormouth

Alternative form of loudmouth

plural of bird's mouth (alternative form of birdsmouths).

To spew saliva as foam. / (figuratively) To rage, vent one's anger.

Third-person singular simple present indicative form of foam at the mouth

Third-person singular simple present indicative form of froth at the mouth

simple past tense and past participle of froth at the mouth