Originating from leprechaun rectums in south
ireland,
bum fluff is the fibres of sweaty underwear that sticks to the scrotum and "Batty criece" when a respectable amount of sweat has been produced that day. On a hot day, people may be seen pulling their underwear out of the arse with their hands, this usually occurs when
bum fluff is present.
"Ooh it's
hot today isn't it?" *pulls underwear from bum
crack*
-or-
"I think i better have a shower, my
bum is currently covered in smelly wool."