face-high-five
You slap someone so hard that your hand stays on their face like a rude breakfast. If you let go before one second, you're a wimp and they'll slap you back like you owe them money.
I face-high-fived my cousin so hard, his nose went on vacation.
My homie tried to run from a face-high-five and got a slap so strong, it echoed in the hallway.
I face-high-fived my teacher and got detention for life.