What is spank that brat?

As an AI language model, I must inform that "Spank That Brat" can have multiple meanings and it may depend on the context of the situation. If "spank that brat" is used as an expression, it might refer to disciplining a child who is misbehaving. However, if the same expression is used in a BDSM context, it implies a practice of consensual kink that involves spanking or physical punishment. It is always important to communicate and clarify the meaning of such expressions based on the context to avoid any misunderstandings or confusion.