Similar to a rock off, a mung off is where two teams of however many members challenge eachother to see how many bodies they can coopertively collect mung from within a set time limit. Terms are discussed beforehand, and whoever wins gets their terms carried out, usually having something to do with humiliating the other team. A popular term is having the losing team gargle mung for extended periods of time.
- I challenge you to a mung off! If I win, you have to go to prom with me!

- And what if I win!?

- I'll....I'll...I'll be your mung slave for a year!
by Labus January 19, 2007
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