Place cut chicken pieces in a sealable bowl or container.
Pour pickle juice over top. Stir or shake to coat.
Place in refrigerator and marinate for at least 30 minutes up to 2 hours.
In a small bowl, place flour, sugar, salt and pepper. Stir or whisk to combine.
In another small bowl, place egg and milk. Whisk to fully combine to make an egg wash.
Pour oil into a large pot. Place over high heat and heat to 300°F as measured on a candy thermometer.
Three or four at a time, dip chicken pieces in egg wash, turning to coat fully.
Remove pieces, allowing excess egg wash to dip off, and move to the flour mixture. Turn and roll to coat fully.
Place breaded nuggets in hot oil, a few at a time, do not crowd, and fry for about 4 minutes or until golden brown, turning as needed.
Remove to a paper towel-covered plate to drain. Keep warm.
Repeat until all nuggets are breaded, fried and drained.
Serve hot with a selection of dipping sauces.