Labia which happen to belong to a women of dubious cleanliness / moral standards. This does NOT ALWAYS refer to a physcially dirty vagina but may indeed purely indicate distaste with the persons behaviour. Originating in the UK.
"Please do not invite ( name of person )to the wedding I could not bear to imagine her dragging along her scruff flaps and just spoiling it"
by scruff flaps March 26, 2008