Birching refers to a form of corporal punishment where an individual is struck repeatedly with a birch rod. Generally, the birch is a bundle of leafless twigs or branches. It does not need to be made of birch.
More About Birching
Birching is a practice that is often incorporated into BDSM play as a form of spanking or paddling. Usually, the recipient is struck across the buttocks. They can also be struck on the back or shoulders. Birching is usually used as a form of punishment or to inflict pain. It can also be enjoyed when used lightly.