What you call a hairy vagina that has been cummed on.
Rihanna hadn't shaved her pussy in weeks. So when her boyfriend pulled out and jizzed on her, she was left with a Spermuda Triangle.
With 1 guy and 3 girls and he jacks off into one of their mouths but can't remember which one and can't find the load
Oh man, I had these three chicks over last night, I blew my load in one of their mouths and couldn't remember which chick, total Spermuda Triangle
When a girl has sex with three guys on the same night and doesn’t know whose stain is on her clothing
“Who’s stain is that?”
“I don’t know, it was a spermuda triangle”