mouth n
1 chops (slang) gob (slang, especially Brit.) jaws, lips, maw, trap (slang) yap (slang)
2 (informal) boasting, braggadocio, bragging, empty talk, gas (informal) hot air (slang) idle talk
3 (informal) backchat (informal) cheek (informal) impudence, insolence, lip (slang) rudeness, sauce (informal)
4 aperture, cavity, crevice, door, entrance, gateway, inlet, lips, opening, orifice, rim
5 face, grimace, moue, pout, wry face
6 down in or at the mouth blue (informal) in low spirits (informal) unhappy