Frosting
A sexual act, in which the male, after having anal sex, ejaculates onto the butt cheeks of the receiving end, and smears it all over with his hands or penis, thus giving the illusion that the butt cheeks have a "frosting" or "glaze".
You can choose to wait till it dries after and then have someone lick it off, which is called the birthday cake.
You can choose to wait till it dries after and then have someone lick it off, which is called the birthday cake.