East Coast Grand Slam
when you get spanked with a bat and then the bat goes up your snatch and butt at the same time, or two bats at once if you're really crazy.
My sister got hit with one bat up her twat and another up her butt like she was a piñata.
At the sleepover, two bats went up her holes at the same time and she cried like a baby.
My brother got hit with two bats at once and he screamed like he was being tortured.