1 definition by SammyC123

YWYM

YWYM - means, Yeah well your mum. This is a come back when you've run out of ideas and is use and a last laugh.

Boy1: Your mum is a MILF
Boy2: erm ..YWYM!
Boy1: wha?
Boy2: aha

by SammyC123 February 15, 2011