h54b
H54B is when you high-five someone just to show off your big ones. It’s like bragging but with hands and meat.
My cousin did an H54B at the beach and got a bunch of guys to high-five him. He was proud as hell.
At the bar, my friend did an H54B with the bartender. The whole place laughed.
I did an H54B with my crush. He looked confused but then smiled.