Fa-nay-nay
The British version of a va-jay-jay, which is a fancy way to say a hole you use to make babies and pee.
He drew a fa-nay-nay on the blackboard and got sent to the office.
My brother said his dog’s fa-nay-nay smelled like old socks.
She told the principal her fa-nay-nay was in a fight.