To strike the ass of a person on their birthday, giving them the amount of swats as their age(for example, a 16 year old would get 16 whacks to the butt). This practice originated in North America as a way to celebrate someone's birthday. There are several ways to do
birthday spankings:
over the knee, bent over furniture,
under the arm, or everyone lines up with their legs spread apart so the birthday boy/girl can crawl under their legs and as they pass by you, you swat their buttocks. Usually, one or all of the parties involved get sexual ensure out of this
