Top Definition
Another way of saying "Are you joking?!"
Guy 1 "I shagged her last night!"

Guy 2 "Wash your mars bar!

Or,

"Your washing my mars bar!"
#suck #my #dirty #mars #bar
by Immi June 30, 2006
5 Words related to wash your mars bar
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.

×