1 definition by Midge Walsh

Top Definition

Blood residue left in someone underpants. Typically the result of anal sex

"Excuse me grocer, do you sell this particular brand of detergent? It is the only kind that can get out fag marks."
"Fag Marks?"
"Blood."
"Get the hell out of my store."

by Midge Walsh January 25, 2009

Buy a Fag Marks mug!