Heat your wok or large skillet over medium-high heat until hot, then add the oil, swirling to coat the bottom evenly.
Add the shrimp to the pan in a single layer. Cook for about 1-2 minutes, flipping occasionally, until they turn pink and start to curl. They should feel firm but still tender.
Push the shrimp to one side of the pan, then add the minced garlic and sliced chili to the cleared space. Sauté for about 30 seconds, until fragrant and fragrant, with a slight sizzle.
Pour in the fish sauce and stir everything together, letting the sauce sizzle and coat the shrimp evenly. Cook for another 30 seconds to deepen the flavors.
Remove the pan from heat and immediately add the torn Thai basil leaves. Toss gently to wilt the basil and release its fragrant aroma, about 10 seconds.
Transfer the stir-fry to a serving plate and squeeze lime wedges over the top for a bright, citrusy finish. Serve hot over rice or noodles for a complete meal.