cactusodomy Share definition Flag the act of sodomizing someone with a cactus. Person 1: "That was horribly disgusting!" Person 2: "No, that was cactusodomy cactusodomy by The Muffin Man 69 April 17, 2009 0 0 Get merch Get the cactusodomy mug. Buy Now — $32.95 See more merch