an anus that is riddled with fust,or a
brown mossy type of fungus that is caused by lack of bum-hygene or clagnut infestations,mainly found surounding the clagnut riddled sphincters of fat girls,you can usually identify bumfust by the
brown and black
fluffy lumps of dryed shat and arse-hair,and also the ripe smell of arse vinegar and sour shit
i was just about to 69 the bitch when i
got an eye full of bumfust!
her bumfust was of such a
vast quantity that i puked on her beef
curtains