A person who appears to be a nice person, but in reality is a bitch. This person tends to talk about people behind their backs and screw people over whenever they have the opportunity. However, to the untrained eye, this person seems like an angel.
Marc - "Wow man, I thought your Jenny and I were really hitting it of at the party last night, she even gave me her number and told me we should hang out. But today I find out that she was telling everybody I was annoying her and being creepy and shit."
Mike - "Ya dude Jenny seems nice, but she's a closet bitch for sure."