A person who assumes an identity or quality other than their own.
He claims to be a doctor, but he's nothing but a fast-talking phony.
A person who professes beliefs or opinions that they do not hold.
He's such a phony, he doesn't believe half of what he says.
Anything fraudulent or fake.
Fraudulent; fake; having a misleading appearance.
A good jeweler should be able to tell a real stone from a phony one.