Sexual act in which you perform oral sex on a woman, starting at the clitoris, then licking all the way down the labia majoras and making your way to the asshole, around and back to the clit.
Girl 1: so how was it last night?
Girl 2: oh my god, he did the McMicken U-turn to me! i can barely stand!
Girl 1: wow, im soo damp!