yammer(noun, verb) noun1. The act or noise of yammering.2. A loud noise.3. One who yammers. verb1. cry loudly, as of animalsSimilar word(s): howl, wrawl, yowlDefinition categories: communication, emit, utter2. complain whininglySimilar word(s): grizzle, whine, yawpDefinition categories: communication, complain, kick, kvetch, plain, quetch