How to Sign "How You Doing"
To sign "how you doing" (also known as the "DO-DO" sign), hold both hands in front of you with your palms facing up. Pinch your index fingers and thumbs together on both hands, leaving your other fingers relaxed. Tap your index fingers and thumbs together a couple of times. Be sure to furrow your eyebrows, as this indicates you are asking a "wh-" question.