A Sherker
A Sherker is when someone sticks three fingers in another person’s butt, usually the middle, ring, and pointer, and then hits themselves with a big ol' Hitler after it.
He did a Sherker in the cafeteria and then hit himself with a big Hitler.
She did a Sherker in the gym and then looked like a Nazi.
He did a Sherker in the park and then screamed like a monster.