-frosting-

n. 1. A composition of sugar and beaten egg, used to cover or ornament cake, pudding, etc. [ 1913 Webster ]

2. A lusterless finish of metal or glass; the process of producing such a finish. [ 1913 Webster ]

3. the lightened color on part of an object, as of hair, produced by treatment with bleach or other chemicals; as only part of the object is thus treated, the final color of the object is two-toned; also, the process of producing such a two-toned effect. [ PJC ]