Monseter Posted in M Best definition Monseter A monster that sits; it could sit all the time, some of the time, or barely at all. He or she is just a monster that sits. You monseter! Get your butt up off the couch and do something. How satisfied are you with the definition? Looking for Monseter meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 108 times.