chatter vs chin music

chatter and chin music both are nouns.

Word	Noun	Adjective	Verb	Adverb
chatter	Yes	No	Yes	No
chin music	Yes	No	No	No

As nouns, chin music is a hyponym of chatter; that is, chin music is a word with a more specific, narrower meaning than chatter:

Other hyponyms of chatter include blether, idle talk, prate, prattle.

chatter (noun)	chin music (noun)
noisy talk	idle or foolish and irrelevant talk
the high-pitched continuing noise made by animals (birds or monkeys)
the rapid series of noises made by the parts of a machine

chatter (verb)	chin music (verb)
speak (about unimportant matters) rapidly and incessantly
talk socially without exchanging too much information
make noise as if chattering away
cut unevenly with a chattering tool
click repeatedly or uncontrollably