1. totally naked for the benefit of another person, as in the 1997 movie "The Full Monty"
2. full erection
taken from the movies' description- The women cheer them on to go for "the full monty" - total nudity. She was totally surprised when she returned to find him standing in the doorway with no clothes on and a Full Monty.
When you get everything on the days lunch menu: the main item, the secondary item, the vegetable, the fruit, and the desert. A "full monty" day is very very rare and occurs only about once every quarter.
Guy 1: Dude, did you see the lunch menu for today!?!
Guy 2: YEAH DUDE! Its a total full monty !