mouth

1 the opening through which food passes into the body of an animal the baby chicks opened their mouths very wide and chirped piteously when their mother came back with worms Synonyms chops, gob [chiefly British], kisser [slang], mug, piehole [slang], trap [slang], yap [slang] Related Words countenance, face, puss [slang], visage; muzzle; jaws, mandible, maxilla; gullet, maw

2 a twisting of the facial features in disgust or disapproval the boy usually makes a mouth when he gets an injection Synonyms face, frown, lower (also lour), moue, grimace, mow, mug, pout, scowl, snootRelated Words flinch, squinch, wince; growl, snarl; rictus, simper, smirk; scoff, sneer; glare, glower, look, stareNear Antonyms grin, laugh, smile

3 disrespectful or argumentative talk given in response to a command or request I won't tolerate you giving your mother mouth about everything Synonyms backchat, cheek, impertinence, impudence, insolence, back talk, sass, sauceRelated Words comeback, rejoinder, retort, riposte, wisecrack; cuteness, discourtesy, disrespect, guff, impoliteness, nonsense, rudeness, tactlessness; audaciousness, audacity, boldness, brazenness; coarseness, crassness, crudity, vulgarity; abruptness, bluffness, bluntness, brusqueness, crossness, curtness, gruffness, surlinessNear Antonyms civility, cordiality, courtesy, diplomacy, politeness, tactfulness; consideration, gallantry, gentility, graciousness, smoothness, suaveness, suavity; deference, respect; affability

4 a person who speaks for another or for a group the press secretary is the official mouth of the administration Synonyms spokesperson, mouthpiece, point man, point person, prophet, speaker, spokesmanRelated Words spokesmodel, spokeswoman; front, promoter, shill; communicator, sayer, talker; agent, ambassador, delegate, emissary, envoy, representative