Green’s Dictionary of Slang

part v.

[SE part with]

[mid-19C–1960s] to give up, to hand over, to restore (usu. of money), to pay.

In derivatives

partable (n.)

[1910s] (N.Z.) of money, spare, disposable.

In phrases

part up (v.)

[late 19C-1970s] (Aus.) to pay money.

SE in slang uses

In phrases

part one’s head with a towel (v.)

[late 19C] (US) to be bald.

part someone’s hair (v.) [late 19C+] (US)

to hit someone on the head.