Ball Vagina 

When you have low hanging balls and a small pee-pee, and you sit down your balls overtake your pee-pee. Rarely diagnosed.

That Scott Newbury has a ball vagina. You can see it through his but cutter shorts!

Ball Vagina by Hsshshsjajs October 19, 2023

Ball bag Vagina 

trousers are a tad tight on a man around the undercarriage causing the seam of the trousers to ‘split’ the ball thus creating a ‘vagina’.

I was sat on the tube and the man opposite had a ball bag vagina

Ball bag Vagina by Assassin006 November 20, 2013