1 definition by ozomatli

Top Definition
The dumping of the septic tank of a moving tour bus on a following vehicle.
"Dave Mathews' bus gave a blue shower to an unsuspecting boat in Chicago."

"A car cut off the tour bus on the freeway so the driver gave it a blue shower."
by ozomatli August 16, 2008
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.