chimer, n. — Green’s Dictionary of Slang

chimer n.

[17C SE chimer, one who rings bells]

(US black)

1. a clock or watch.

1940		D. Burley N.Y. Amsterdam News 15 Feb. 1: The Apple’s twirling, Jack, a deuce of boxcars around the chimer.
1944		implied in let someone down for their chimer

2. the heart, which also ‘ticks’.

1994

let someone down for their chimer (v.)

(US black) to steal a watch.

1944

D. Burley Orig. Hbk of Harlem Jive 117: She latched onto a Lane from Fort Wayne, and let him down for his chimer.