mendacimaniac Posted in M Best definition mendacimaniac Someone who is a compulsive liar. This town is full of mendacimaniacs–they’re so obsessed with image, they put spin on every peep that issues from their prevaricating holes. How satisfied are you with the definition? Looking for mendacimaniac meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 19 times.