Dirty Mortenson Share definition Flag The act of banging a chick in the ass, then getting head, and then French kissing her That hoe from the club last night tried to give me a dirty Mortenson. I kicked her the fuck out! Dirty Mortenson by 520supra August 25, 2014 0 0 Get merch Get the Dirty Mortenson mug. Buy Now — $32.95 See more merch