jawbone(noun, verb) noun1. the jaw in vertebrates that is hinged to open the mouthSimilar word(s): jowl, mandible, mandibulaDefinition categories: body, articulator, jaw verb1. talk idly or casually and in a friendly waySimilar word(s): schmoose, schmooze, shmoose, shmoozeDefinition categories: communication, chaffer, chat, chatter, chitchat, claver, confab, confabulate, gossip, jaw, natter, visit