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]

[1940s+] urolagnia, i.e. the act of urinating on one’s partner as part of sexual experimentation; also attrib.

In compounds

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

[1960s+] a homosexual who enjoys being urinated on.