1.NounA fastball thrown near the batter's chin, often to set up a subsequent pitch thrown low and outside.
"Jones backed Smith off the plate with a little chin music."
2.NounA bouncer aimed near the batsman's chin.
3.NounIdle talk; chatter.
4.NounRhythmic singing, usually to nonsense syllables, in a style partly inspired by the instruments used to accompany folk dancing in Irish and Scottish traditions.