man-e-faces

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!