Phony here to quote fierycj's Advanced Learners Dictionary refers to those whose words, actions and general demeanor can be deemed as plastic, superficial, shallow, and lacking depth of any kind. Now dig in boys and girls!
Mark Wahlberg. He's either really terrible or some kind of genius. I fear the former, however. Also, maybe Arnie. He turned out not to be an actor after all - just a politician cunningly building up a profile so he could pursue his true goal of world domination.