What is Biffkin?
It is the bit of skin between your scrotum and your anus. It can also be used to insult people.
You lick biffkin
You are a biffkinator
the space between ones legs, betwen the anus hole and the bollock sack on a man
the main area where arse hair grows.
"youve got a hairy biffkin"
male anatomy - the area of the sin between the scrotum and the rectum
The hair that grows off the gooch not the gooch itself!
My biffkin is getting too long. I may need to shave it.