Combine tequila, lime juice, sugar, olive oil, salt, pepper and re pepper flakes in a large bowl. Add wings and toss to coat.

Cover and marinate in the fridge for 4-6 hours.

Remove the marinated wings from the refrigerator and let come to room temperature.

Preheat grill to high heat. Place wings on the grill over indirect heat. Grill for 25-35 minutes, turning occasionally, until wings begin to brown and meat is cooked through. Move wings over direct flame to crisp the skin. Cook about 2 minutes on each side.