shaka

noun

1. A greeting gesture in which the thumb and little finger are extended while curling the three middle fingers in a semi-fist, used to express a variety of positive meanings including all right, hello and goodbye.

   “Greet someone with the slang, “Howzit?” and say goodbye with a flash of the “shaka” sign (fist closed, thumb and pinky extended) and you have established your credibility with Hawaii natives.”

   “US President-elect Obama flashes the 'shaka' before he greets a crowd […]”