1 definition by Letty : )

What's your mum?

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?

Etc.

by Letty : ) April 17, 2008