Bring a large pot of water to a boil. Generously salt and add fettuccine noodles. Cook until al dente according to package directions. Strain pasta and set aside.
Season shrimp with salt and pepper. Heat oil in a large skillet over medium-high heat. Add shrimp and cook until shrimp just turn pink and start to curl for about 4 minutes. Transfer to a bowl and toss with Slap Ya Mamma Pepper Cajun Sauce.
Reduce heat to medium and add butter. Once it melts add garlic and red pepper flakes. Saute until garlic is fragrant, about 30 seconds
Deglaze the pan with white wine. Stir and scrape up any of the browned bits in the bottom of the pan. Let reduce for 3-4 minutes.
Once reduced, add heavy cream and bring to a simmer. Reduce heat to low, stir in parmesan cheese and remaining Slap Ya Mamma Pepper Cajun Sauce.Season with salt and pepper to taste.
Toss in cooked fettuccine and stir until all pasta is coated.
Divide among bowls, top with cooked shrimp, and garnish with chopped parsley.