The clotting of anal hair due to the application of excrement.
Oooooo I don't think I wiped properly I've got gruffnuts hangin out of my posterior
The small pieces of feces that get stuck in one's buttocks hair.
"I've got some itchy gruff nuts."
The little bits of poo that can gather on hairs around the anus.
i.e. That girl has lots of gruff nuts dangling down.
noun; a piece (or pieces) of faeces stuck in the hair around your anus
"mate, i found the biggest gruffnut last nite"
the pooey mess left behind in the anal hair if an anus is not wiped with enough care is called gruffnut.
Glen recieved lots of gruffnut when he went for a poo and didnt wipe afterwards. This caused a discusting mess to be left in his anal hair over the anal region and his undergarments.
lumps of dried poo attached to the hairs of your bum. See 'Dangle berry'
God damn she's got some gruffnuts