Dirty marlin Share definition Flag It's when you are doing doggie style and you stick a finger in her butthole and then fish hook her. So we were getting busy last night and she wanted something more risque. So I gave her the dirty Marlin. Dirty marlin by Malcolm's finest September 16, 2017 0 0 Get merch Get the Dirty marlin mug. Buy Now — $32.95 See more merch