Green’s Dictionary of Slang

golden shower n.

also golden rain, GS, G/S, G.S.
[SE golden, yellow-coloured + shower n.; note 17C use of golden shower as a euph. for copulation, the image coming f. the Greek myth of Danäe, who was seduced by Zeus in the form of a shower of gold]

urolagnia, i.e. the act of urinating on one’s partner as part of sexual experimentation; also attrib.

[UK]T. Williams Letters 111: Only thing I really enjoy is a ‘golden shower’ from a black cloud.
G. Legman in Neurotica Spring 3: Urine-drinking [...] ‘the golden shower’.
[US]K. Brasselle Cannibals 126: ‘May the bird of paradise wee-wee all over his balls’ [...] ‘He likes that, too.’ ‘My God, don’t tell me he’s a “golden shower” boy!’.
[US]L. Kramer Faggots 105: Today he’d tried two new things. A golden shower and a tea-room.
[US]A.K. Shulman On the Stroll 119: The trick [...] offered her an extra twenty if she would give him a golden shower. ‘What is that exactly,’ she asked. [...] ‘You just sit on me the way I show you and . . . urinate.’.
[US]Women in Command 16 in Murray & Murrell Lang. Sadomasochism (1989) 78: Mistress Julie of New York is accepting slaves who enjoy S&M, B&D, enemas, foot worship, G/S and related subjects.
[UK]P. Bailey Eng. Madam 79: She had a lot of what are known in the trade as Golden Rain clients – blokes who want to be peed on.
[US]B. Gifford Night People 26: He lost control, and sprayed her all over [...] Cutie, still dripping wet from the golden shower, ran out.
[Aus]S. Maloney Big Ask 281: ‘Very juicy,’ said Farrell. ‘Nothing like a bit of bondage.’ Golden showers were more his preference, I thought.
[SA]Sun. Times (S. Afr.) Lifestyle 27 Jan. 10: James [a rentboy] says he does most things: bondage, blowjobs, golden showers.
[Aus]T. Spicer Good Girl Stripped Bare 46: Pornographic photos [of] girls getting golden showers.

In compounds

golden shower queen (n.) (also golden stream queen, GSQ) [-queen sfx (2)]

a homosexual who enjoys being urinated on.

[US]Homosexuality & Citizenship in Florida 24: Glossary of Homosexual Terms [...] types of queens: 69 queen / Browing queen / Reaming queen/ Belly-wh queen / Hand queen / Golden shower queen. (All of the above are fairly well self-explanatory).
[US]I. Rosenthal Sheeper 47: A golden stream queen, for your information, is not a Buddist heresiarch [...] sitting in a bathtub to be pissed on is a little bit like fumbling with rubbers.
[US]B. Rodgers Queens’ Vernacular 184: GSQ = a golden shower queen; one who digs being pissed on, etc.
[US]Maledicta IX 159: Now we must turn to the piddling nuisances of what is often called W/S (water sports or the erotic games of golden shower queens with urine).
[SA]K. Cage Gayle.