noun, plural pho·nies. something that is phony; a counterfeit or fake. an insincere, pretentious, or deceitful person: He thought my friends were a bunch of phonies.

What is phony behavior?

1. phony - a person who professes beliefs and opinions that he or she does not hold in order to conceal his or her real feelings or motives. dissembler, dissimulator, hypocrite, phoney, pretender. beguiler, cheater, deceiver, trickster, slicker, cheat - someone who leads you to believe something that is not true.

What do you call something that is not authentic?

: not real, accurate, or sincere : not authentic : inauthentic an unauthentic document unauthentic ingredients.