rusty wank stain Share definition Flag A cum stain left on a couch or clothing which has been there for weeks "Phil don't sit there" phil-"why" jack-"there is a 'rusty wank stain' there" rusty wank stain by rusty wank stain February 20, 2015 0 0 Get merch Get the rusty wank stain mug. Buy Now — $32.95 See more merch