the dirty tuna Share definition Flag When a girl grinds on you and leaves a red mark (blood) on your leg because she's on her period. Dude, is that blood on your leg? You just got the dirty tuna'd!!! the dirty tuna by Domidango December 22, 2013 0 0 Get merch Get the the dirty tuna mug. Buy Now — $32.95 See more merch