Golden showers
From BDSM Wiki
A golden shower is the concept that refers to the term meaning to urinate on someone, or some would say, to piss on them. It is an act of humiliation that also references a specific power exchange, namely, between the person urinating on someone, and the person being urinated on, at least if you subscribe to some form of role essentialism.
Synonyms for urinating on someone include peeing, pissing, weeing, leaking, and golden-rodding. Similarly, one can also store one's pee in the fridge and use it for a cold golden shower.