Wilnot

n.

Heard in Waterford

Tiny balls of cotton, mixed with excrement and impossibly entangled in one's bum hair. It has bothered scientists for years why they are always navy in colour regardless of the shade of undergarment worn.

In use

Go and wash the willnots from the baieegs of yer barse!

Posh English

Go and cleanse the tiny entangled matter from the perineal region of your posterior.