In a saucepan, combine pineapple juice, brown sugar, whiskey, and soy sauce.
Place the pan over medium heat, stirring occasionally.
Add the teriyaki sauce, white onion, and garlic to the mixture.
Continue cooking for about 10 minutes until slightly thickened.
Heat olive oil in a skillet over medium-high heat.
Season shrimp with salt and pepper.
Add shrimp to the skillet and cook for about 2 minutes on each side until opaque.
Pour the prepared sauce over the cooked shrimp, ensuring they are well coated.
Simmer for an additional 5 minutes.