Top Definition
It simply means:
anal sex
Fred: "My doctor says that I have a very dirty prostate."
Sam: "Maybe you should stop doing the rumpbutt then."
by AntwontheUnicorn November 12, 2013

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.

×