Top Definition
Used as a comeback when someone insults you,
or just when someone says anything really..
Fred: OMG, you're such a gimp.
Bill: What's your mum?

Luke: This milk has gone off. It's all stale and lumpy.
Jane: What's your mum?

by Letty : ) April 17, 2008
5 Words related to What's your mum?

Free Daily Email

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

Emails are sent from We'll never spam you.