What is a woo girl?

A "woo girl" is a slang term used to describe a woman who is known for enthusiastically shouting "woo" or making loud, high-pitched noises in social settings, such as parties or concerts. The term was popularized by the television show "How I Met Your Mother" and has since become a common phrase used to refer to women who are energetic, outgoing, and often the life of the party. Woo girls are often seen as fun and carefree individuals who enjoy having a good time and celebrating loudly with their friends.