Generally just a huge bitch that backs out of everything, also known as a half sender.
Don: Don’t be a Hung The Mung tonight, send it at the club with us
Rob: You already know I ain’t a Hung the Mung, it’s a full send tonight!
Overnight low hung mung refers to a marine layer that develops over Southern California beach communities mainly in Spring and in summer
Yo let's go to the beach today . Reply, Hey bro it would not be a good day at the beach cuz, they will be that overnight low hung mung.