A sexual act performed between two or more males. An actee folds his flaccid penis on itself like a snail's shell or a cinammon bun and holds it in that shape. One or more actors ejaculate onto the folded penis to create the frosting.
Damon: What did you have for lunch?
Boss: A Cinnamon bun.
Damon: Do you mean a Scottish Cinnamon Bun?
Boss: I don't think it's Scottish.
Damon: The cinnamon bun is known to be of Scottish origin. Are you sure it wasn't a Scottish cinnamon bun?