Green’s Dictionary of Slang

hang v.6

(US)

1. to murder.

[US]W. Burroughs Naked Lunch (1968) 20: He hangs three fags before the fuzz nail him.

2. to beat up.

[US]‘Iceberg Slim’ Pimp 93: I guess you saw pimping ‘Poison’ hanging that whore.

In phrases

hang someone’s ass (v.)

see under ass n.