1 definition by Proctologistno2

Top Definition
The burning/itching feeling one gets after a wet bowel movement. Usually the effect of not wiping ones rectum well enough. other symptoms include awkward way of walking, soggy undergarments and a brownish stain on sed underpants. the only hope of ridding yourself of rainbows is using moist tissue paper to re-wipe your rectum. Symptoms will dissapate rapidly.
Mike- "Dude why do you keep scratching you butt-crack?"

Josh- "I just took a shit man, these rainbows are killin' me!"

Mike- "Dude just wipe your ass better then it'll go away."
by Proctologistno2 January 28, 2010
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×