How to Sign "Coke"
To sign coke (as in the Coca-Cola beverage), start by holding your non-dominant arm slightly across your body in a relaxed position. Form a '1' handshape with your dominant hand by extending just your index finger, keeping the rest of your fingers curled into a fist. Bring your dominant hand to your non-dominant upper arm and poke the tip of your index finger into your bicep. This motion is usually done with a quick, deliberate jab or a light double tap.