typically an old bottle or plastic cup that contains someone's spit from either chewing tobacco or dip. but there needs to be a sufficient amount of mud in a jug in order for it to be classified as a "mud-jug."
Dude! you spilled the fucking mud-jug all over my living room carpet! how am I gonna explain that disgusting brown stain? ughhhh it smells like shit!
by The Beat Laboratory March 14, 2011
The Tennessee mud jug is the act of fucking a woman and you have a lip full of Copenhagen, you proceed to pull out and spit the dip into her vaginal canal and proceed to fuck.
by Noah Edmund 420 July 4, 2019