When a woman gets ice cubes and nesquick stuffed into her anus. Then a man inserts his penis into the anus and ejaculates thus mixing the contents into a creamy substance similar to soft serve ice cream. To finish this act, the man then dispenses the chocolately goodness into a cone by slowly pulling out his penis.
David: That St. Louis Soft Serve was good!
Tonya: Yeah, I guess my ass is good for something!