n. A shower of urine delivered onto the victim by a multicultural group of pissers.
In prison, Sven, Tuan, Rajif, Leroy and Chief Bigbear all gave Stevie a rainbow shower.
by Mango January 2, 2003
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Where the recipient of a rainbow shower is urinated on by multiple people simultaneously by people with varying levels of dehydration.

For extra points, urinators may have consumed beetroot (makes urine pinky-red) or berocca (green colour) in advance.
Oh my god did you hear Cathy's housemates gave her a rainbow shower last night?
by Setvep December 14, 2021
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A group of people pissing on one person
"I just sat there under a stream of rainbow showers"
by Chris1372 March 25, 2008
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