A person who gets mad at you because you hooked up with the girl he's been trying to hook up with for years but never got to hook up with her because he's too ugly for her and she wants nothing to do with him. These people usually try to hook up with said girl for years but no matter how many times she says no, he still never gets the hint because these people are also retarded.
"that's dude over there is a Jealous Little Bitch because he's hating on me for fucking the girl of his dreams."