Green’s Dictionary of Slang

chops n.1

also chaps
[16C SE]

1. [late 16C+] the jaws, the mouth, the lips.

2. [late 19C] (Aus.) food, a meal.

3. [1940s+] (orig. US black) ability, skill, competence [jazz musicians fig. ref. to the use of one’s mouth and lips in playing a wind instrument].

In phrases

beat up someone’s chops (v.)

to nag, to criticize.

bust one’s chops (v.) [1950s+] (US)

1. to talk incessantly.

2. to work very hard.

3. to make a great fuss about something.

bust someone’s chops (v.)

to nag, to criticize.

down in the chops (adj.)

[19C] depressed.

flap one’s chops (v.)

[20C+] to talk incessantly, to gossip.

flog one’s chops (v.)

1. [1960s+] (Aus.) to work very hard.

2. [2000s] (N.Z.) to talk incessantly.

grease one’s chops (v.)

[1920s–70s] (US black) to eat, esp. to eat highly greasy food.

lick the chops (v.)

[1930s–40s] (US black) of musicians, to tune up before a performance.

run one’s chops about (v.)

[1960s+] (US black) to talk, to complain.

slice one’s chops (v.)

[1940s] (US black) to talk.

wag one’s chops (v.)

[mid-19C] to chatter, to gossip, to complain.