A pun on "Many faces".
Term used to describe a bi-polar individual, or someone with a split personality. Also, to describe the rapid-fire ability of someone to go from one emotion to another, much like the sidekick/pal of He-man on Masters of the Universe.
She was act'n all lovin until I took away the credit card, then she went all man-e-faces on me!
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!
Samantha is a wonderful wonderful person she's a girly girl but not a tomboy either more like in the middle but very very kind and sweet, attractive, forgiving although it might take a day or two for her to make up her mind so if u find a samantha keep cuz one thing about she is a great bff loyal fights for and will always be there when u need her