In a bowl, whisk together mayonnaise, honey, barbecue sauce, mustard, and lemon juice. Cover and refrigerate.
Cut chicken into bite-sized pieces.
In a bowl, mix cold water, salt, and Worcestershire sauce. Add chicken and brine for 30–60 minutes in the fridge.
In one bowl, combine flour, breadcrumbs, salt, onion powder, pepper, garlic powder, and baking soda.
In another bowl, whisk egg whites until foamy.
Remove chicken from brine and pat dry.
Heat oil in a deep pan to 350°F (180°C).
Dip chicken into egg whites, then coat in the dry mixture.
Fry in batches until golden brown and cooked through, about 4–5 minutes.
Drain on paper towels and serve Crispy Chicken Nuggets hot with dipping sauce.