rainbow shower 

Vomit play. Contrast with "golden shower", "brown shower", etc

rainbow shower by Anonymous May 29, 2003

Rainbow shower 

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?

Rainbow shower by Setvep December 14, 2021

rainbow shower 

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.

rainbow shower by Mango January 2, 2003

rainbow showers 

A group of people pissing on one person

"I just sat there under a stream of rainbow showers"

rainbow showers by Chris1372 March 25, 2008