Mung is the angle of attack of a disc. Wing up being positive mung, wing down being negative. Mung creates additional drag and/or additional lift on the disc creating a stalling effect that leverages speed and Spins and Twists are tricks where the dog spins 360 degrees in a clockwise or counter clockwise fashion. Spin is clockwise and Twist is counter clockwise so it is important to have a... More into lift. It is employed to float and hover discs at a distance.
Mung plays a large role in air bounces and floaters and is a critical attribute in disc dog freestyle and games.
Mung, positive or negative, is not a desirable trait in distance throwing with light plastic.