This is the stream of fluid that is projected from a vagina when she is having intense pleasure. Also known as Squirt, Love Juice, Vagina Sauce, projectile cum and intense vaginal secretion.
FuckPiss in its intended context would look like a stream of fluid flowing intensely and steadily from the vagina.
FuckPiss - Noun
In a sentence -
Wow, I was with Mary last night and when she got off, i was soaked with FuckPiss!
I was giving Kim some oral and she almost drowned me with her FuckPiss!
The only thing I love more than Chocolate Chip Mint ice cream is being hit with a stream of FuckPiss!
Holy Moly, her FuckPiss was running down my balls and onto my knees. I took a picture of the wet sheets if you don't believe me!