biffon 

the part between a womens vagina and anus

don't let Ross near the Biffon that's where he loves a sniffen

biffon by Ls May 7, 2003

biffon 

the female notcha

the space between the females vagina and anus

the bit the balls biffon during sex

biffon by Ben Bashford August 5, 2002

biffon 

the part that seprates you balls from your arse, or your vagina from your anus.

fun to fondle during sexual activity

*sing*
the line between your ass and your balls is called your biffon, it is a place that you should really not be sniffin'

biffon by sam + teegan (H) February 1, 2008

Biffon 

The region between genitals and arsehole, also known as the perineum. This gets its name as it’s the part of the body that the balls ‘biff-on’ during sex.

The slapping of my balls against the biffon made a lovely rasping sound.

Biffon by Μῑνώταυρος January 3, 2023

Biffon Bridge 

The bridge of tissue between the anus and vagina, on which a mans hairy bean bag is likely to 'biff' against during enthusiastic coitus.

I could hardly hear the telly for the noise of my nads slapping against her biffon bridge

Biffon Bridge by steviestevoid June 28, 2011

Slap the biffon

To thrust one’s manly testicular orbs against the tender patch of flesh between a woman’s nether regions - repeatedly, with such force and enthusiasm that it might inspire both awe and minor bruising. Can also refer to cheeky prelude play, in which one’s hand “slaps the biff” to tease, torment, or tantalize.

“I dare say, after three minutes of passionate chaos, big John proceeded to slap the biffon with such vigor that Lady Mildred howled like Michael Jackson in a kids home and nearly dislodged the chaise longue.”

Slap the biffon by Burnaldsr. September 20, 2025

Biffen 

The small stretch of skin between a males anus and his ball sack.

"There is a place between your crack and your sack called your biffen, that's the place you don't want to be a sniffin'.

Biffen by Stano October 19, 2013