Polyhedron

[Jessica]

A body or solid contained by many sides or planes.

[Sonia]

A multi-sided object, ie. a die or dice
A person who cheats on his or her significant other. Derives from two-faced cheating scum and similar phrases extrapolated to polygamous relationships of any number.
A person with many sides to him/herself.

[Marquetta]

A solid figure with many plane faces, typically more than six.