1) shit
stuck to your arse hairs.
also called. cling-ons,
tag knots, clinkers, dangle berries, arse
spiders, winnits etc.
2) an insult commonly used towards those who cant do their job properly.
1)
colin: bugger me my arse is itchin'
dave: ur bum nuts playin up again?
colin: yeah, i'll pick 'em out wi' chippin hammer!
2)
oi bum nuts u fucked it up again u usless twat!