We found 4 dictionaries that define the word rainbow showers:

General (3 matching dictionaries)

1. rainbow showers: Merriam-Webster
2. rainbow showers: Vocabulary.com
3. rainbow showers: Wiktionary

Slang (1 matching dictionary)

4. rainbow showers: Urban Dictionary

(Note: See rainbow_shower as well.)

Definitions from Wiktionary (rainbow shower) ▸ noun:  (slang) The act of vomiting on somebody for sexual gratification. ▸ Also see rainbow_shower ▸ Words similar to rainbow showers ▸ Usage examples for rainbow showers ▸ Idioms related to rainbow showers ▸ Wikipedia articles (New!) ▸ Words that often appear near rainbow showers ▸ Rhymes of rainbow showers ▸ Invented words related to rainbow showers