HOWZIT BRAH

"Grandpa, what's the story with the Shaka sign?"
"I use it whenever I say 'Hi" or "Bye" to somebody.
Or if somebody lets you in his lane, you can use it to
say 'Thanks Brah for letting me in your lane'. You can
also use it if you wanna give somebody a high five but
he's a little too far away...you can give him this instead.
It's also useful in the old Hawaiian knock knock joke:
Knock knock.
Who's there?
Me ma.
Me ma who?
Then make da shaka sign."
"Grandpa, you're so smart."