The act of inserting ones johnson into the vagina,while forcing her onto her back in order to ride her down a staircase, hence the bobsled.

Right before the moment of ejaculation while having doggy style the male reaches around and knocks out the girls hands from under her.

v. The sexual act of defecating on a womens chest and then titty fucking her.

Riding a black woman down a flight of stairs.

while fucking a girl at the top of the stairs on her hands and knees. right before your ready to blow your load you knock her hands out from under her and ride her to the bottom with your dick still erect and inside of her

Sexual act in which a male is performing anal sex in the doggy-style position to a female (or male) at the top of a staircase and at some point during intercourse, pushes off from the top of the stair case and rides the female (or male) down the stair case like a horse while still having intercourse

The act of preforming anal sex to a girl. Then you slide down a flight of stairs with her underneath you. you have to try staying inseted while going down the stairs and pig squeeling at the same time. Pretty much the best sexually oriented thing ever created.