Boo is a recurring character in the first and second series of the comedy drama Fleabag. She was Fleabag's best friend, and co-owner of the cafe that the two of them ran. She is played by Jenny Rainsford.
Boo accidentally killed herself after learning that her boyfriend had cheated on her. She intended to injure herself by stepping out into a bike lane, but the resulting crash caused the death of three people, including Boo.