grundle

Grundle is another word for chad: the region between the balls and the arse-hole; can be an erogenous zone for some. Girl: I was fingering that part between his balls and his arse and there was shit there. Everyone listening remained silent but later laughed among themselves: 'Eww! He had a shitty chad.' When you measure your dick, you don't start at the arse-hole and include the chad; you risk getting shit on your measuring tape.