The wierd person in your town all the kids are afraid of/find funny. They usually have wierd habits or looks. The origin of this word is from To Kill A Mockingbird.
Person#1: Who's that wierd lady who stays in her garage all day and has crappy tag sales every weekend?
Person#2: Aww, no one, it's just our Local Boo.
Person#2: Aww, no one, it's just our Local Boo.
by DougAHole May 9, 2005