A Tokyo Lampshade is where a naked woman straddles a man's shoulders as he is face down on the bed or floor. She grasps his face in a way that all upward force, which is vigorously applied, causes the corners of his eyes to stretch outward as she crams his head into her vagina.
Hey Mike, I heard you got pink eye?
Yeah, there was a hooker at my brother's bachelor party and she gave me a Tokyo lampshade.