Kleptopal
A friend who takes your stuff without asking and claims to never have seen it, or leaving an item in their house/car when you ask if they have it they say no, and you end up finding out they really did have it(either because they used it in front of you and they're so stupid they forgot OR you just randomly see it with their things).
Sara: Omg, Michelle is such a kleptopal! I went to a party last week with her and I left my lip gloss in her car, and when I asked her if she had it she said I lost it while I was drunk, and I know she totally had it!
Ashley: What? how did you know she had it?
Sara: Dumb hoe used it right in front of me the very next day!
Ashley: What? how did you know she had it?
Sara: Dumb hoe used it right in front of me the very next day!