(countable) Any of the bones in the lower or upper jaw.
(countable) The bone of the lower jaw; the mandible.
(countable, singular or plural, music) A shaken musical instrument (an idiophone) made from the jawbone of an animal and shaken such that the teeth vibrate in their sockets to produce sound.
(uncountable, slang, archaic) Credit.
verb
To talk persistently in an attempt to persuade somebody to cooperate.