One who makes a habit of uttering numerous falsities. An individual becomes a true falsinator after a tirade of false statements.
My girlfriend is such a falsinator. Just last night she was going on and on about how lame I was in the sack. It was a tirade of falseness, therefore I deem her a falsinator. Or is she correct? And this tirade that was intended to prove her falseness makes myself the true and only falsinator. Oh cruel fate...doh!