A really badly tangled clump of shit in the anus hairs. Usually occurs when you have long asshole hairs, much worse than dingleberries. nearly impossible to maintain the will to live when you have to deal with a knot of shit in your butt grass! Not to be confused with the common insult for the band slipknot.
Leon S. Kennedy was fired from the racoon city police department on his first day because of the overwhelming stench of crap emanting from his old crusty shitknot!! Resident evil rocks, by the way.