insta-bleeder
when a wound occurs, such as a papercut, and begins to bleed immediately, normally resulting in a bloody mess.
Tiffany: "Ouch!..Dude that was a wicked paper cut i got just now."
Stephanie: "Ooooooh! That one's an insta-bleeder!"
Stephanie: "Ooooooh! That one's an insta-bleeder!"