It is when a girl is a filthy slut, since a Cheese Washer may be used for many different uses, all kinds of different ways. Hence the phrase Dirty Cheese Washer.
That Rachel is such a Dirty Cheese Washer. I heard she screwed three guys in every hole all on the same day! Nasty!
by Muno The Biter April 10, 2015
Get the Dirty Cheese Washermug.