1. Gruffnut 22 up, 4 down
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
by Dave T Oct 26, 2003 share this add comment
2. gruffnut 7 up, 2 down
noun; a piece (or pieces) of faeces stuck in the hair around your anus
"mate, i found the biggest gruffnut last nite"
shit poo bum anus poo hair
by james-is-sexy Jan 19, 2006 share this add comment
3. Gruffnut 8 up, 5 down
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.