Top Definition
Deposit of fecal matter, Shit, Huge dump, greasy ass gravy, cone of feces
My buddy just left a jimcoan upper decker in your bathroom; I had to change 6 diapers today, the kid was pumping out jimcoan like theres no tommorrow; God dammit, it smells like jimcoan in here. Christ I stepped in jimcoan again, time to throw these boots in the garbage.
by Jeremiah jones III June 22, 2011
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