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Its when you have perminent diarrhoea. Basically when you spend all day on the shitter due to the fact that theres a constant flow of liquid. Can last for days.
charlie- "you comin out tonight geez?"
jim- "Nah, got a harsh case of permi d mate. Not gonna be able to leave the house for days"
by Jim Hand April 08, 2007

Words related to permi d

diarrhoea shitts sloppy poo squirts squits the runs