Go to any surfing beach today and you’d be hard-pressed not to find someone throwing a “shaka” hand—thumb and pinkie extended, three middle fingers curled against the palm. The iconic gesture, sometimes referred to as a “hang ten” or “hang loose,” has traveled far from its Hawai‘i origins. Today, American presidents, London nightclub goers, and even the emoji keyboard all sport the shaka hand. Saa Tamba, owner of Tamba Surf Company on Kaua‘i, has been throwing shakas his whole life. “It’s just, from my perspective, a way of saying hi,…