any of a family (Chamaeleontidae) of chiefly arboreal Old World lizards with prehensile tail, independently movable eyeballs, and unusual ability to change the color of the skin
chameleonlike
noun(cha-me-leon)
a person who often changes his or her beliefs or behavior in order to please others or to succeed
chameleonlike
noun(cha-me-leon)
one that is subject to quick or frequent change especially in appearance