chuffbumpkin
A wad of folded toilet paper placed in between the arse cheeks at the height of the anus, in order to prevent 'seepage' and subsequent staining of one's underwear especially after heavy farting.
'Well children, I hope you all enjoyed your bean curry, now before we proceed to a dessert of prunes and apricot juice, would you please ensure that all chuffbumpkins are firmly in place'