Top Definition
The smelly haze generated by a gigantic, uncontrolled, smouldering pile of bovine manure.
Jethro: Festus, can ya b'lieve the mount'n 'hind the feedlot is still smokin'?

Festus: Word! I caught it clear from town. The smung is wack.

Jethro: What?
by Pgiddy January 19, 2005
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