Definitions by Boardy

Mouldy Underware 

It refers to someone where they have taking a piss through there underware and left it for 1-2 weeks as it was left moist, mould starts to grow in the crotch regeion giving the effect of mouldy underware

Robert had a poo bum and didnt wipe it, after a couple of weeks he had mouldy underware

Mouldy Underware by Boardy August 14, 2009