Top Definition
an incredibly lengthy and fat penis.
Belinda: So, how big was his...you know? (giggles)

Sue: Christ, he had a real willy wumper, like a jumbo Ballpark Hotdog!
by DrCauliflower May 02, 2008
9 Words related to willy wumper

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.

×