Gooch 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.
The piece of skin connecting the scrotum and testes to the poop chute. The gooch is also attached to the bacon strip which is located directly on the undercarriage of the testes.
I think i need to get deodorant for my gooch, it always sweats profusley, I think the goochglands are swollen.