A female that appears initially to be attractive, but when seen from different angles or on different occasions, looks to be ugly or mediocre. This pattern can continue and makes it difficult for males to know if the girl is really attractive or not. Shapeshifters are often good at hiding their ugliness with hair, certain makeup, or clothing in very specific instances.
"I can't figure this girl out. The first time i saw her, she looked really hot. Then on our next date, she looked totally average. She's a shapeshifter."