Top definition
Sanitary towel. A sheet of plasticky cotton-wool with wings on it that you buy from the chemist, put inside womens undergarmetnts in order to catch all the bloody mess that comes out of the vagina during lady-time
Dude#1: Phew! Whats that smell?

Dude#2: Oh it's just Stacey. I think it's time to change her gash plaster.
by Franck Butcher March 29, 2008
Get the mug
Get a gash plaster mug for your cat Paul.