Christ, it boils my piss. It's so unbelievably crap. No, you're not a surfer dude from laid-back So Cal, you're a middle manager in an office supplies company and you drive a Zafira.
And that goes for whooping, too. I don't want to whoop. Or high-five. Or do special handshakes which you need fifteen fingers for. Or bump fists or anything else that you saw on World's Wildest Police Chases or American Creampie Bonanza or Man Vs Food.
If you're properly British, a smile, and perhaps if something amazing has happened (like winning the lottery or flying to the moon) a hearty handshake and a 'Jolly Well Done' would be fine.
High-fiving - death sentence. AIBU?