Peel and devein the shrimp, leaving tails on, and pat completely dry with paper towels.
Mince the garlic and jalapeño finely. Juice the limes into a small bowl and set aside.
Melt the butter and olive oil together in a 12-inch skillet over medium heat.
Add the minced garlic and jalapeño to the melted butter mixture. Cook for 90 seconds, stirring constantly, until fragrant but not browned.
Stir in the Pickapeppa sauce, Worcestershire sauce, and fresh lime juice. Simmer for 1–2 minutes until slightly thickened and glossy.
Season with black pepper and a pinch of salt.
Add the shrimp to the pan in a single layer. Cook for 2 minutes, then flip with tongs and cook for another 2 minutes, until the shrimp curl into a loose "C" shape and turn opaque pink-orange throughout.
Remove the pan from heat immediately once the shrimp are just cooked through.
Taste the sauce and adjust with additional lime juice or salt if needed.
Serve immediately from the skillet with toasted crusty bread for dipping.