A sexual position involving male coordination and balance in order to balance on the fulcrum of a woman's upturned ass.
Superman or super man is when the woman (while on knees and with her face to the bed) sticks her ass and vagina up in the air. From there, the guy first sticks it in and then proceeds to stretch out his arms and legs as if he were flying like Super man all the while balancing on the woman. Enjoy!
Yesterday, me and my girlfriend pulled off super man and it was the hottest move ever. You should try it!