a noun; when the giving party runs splay-legged over the receiving party, both naked of course, and poops while running onto the prone recipient. like a hot carl, but more fast. can also be done on roller blades.
i saw this chick laying there and we were both naked so i cowboy-walked over to her and starting increasing speed then lit a nice fast carl on her, a belly-button bulls-eye. she told all her friends.