English word K-hole comes from English ketamine, English K ((legal, informal) A contract.)

Detailed word origin of K-hole

Dictionary entry	Language	Definition
ketamine	English (eng)	A pain-killing drug and anaesthetic, commonly used recreationally.
K	English (eng)	(legal, informal) A contract.
K-hole	English (eng)	(slang) The state of dissociation from (and lack of control over) the body commonly experienced after taking relatively high doses of the drug ketamine.