What is mung-guz?

A human being who mung's food at a ridiculous rate and guzzles liquid at an even more ridiculous rate.

Person 1: Hey where did all the salami go, I bought a kilo of it yesterday.
Person 2: I dunno, I think person 3 ate it all.
Person 1: What a mung-guz

mung-guz - meme gif