What we found is "Vegas Bomb" drink. Here's the recipe courtesy of DrinksMixex:
Ingredients
1/2 oz Crown Royal® Canadian whisky
1/2 oz DeKuyper® butterscotch liqueur
Red Bull® energy drink
Direction
Pour 1/2 oz of Crown Royal and 1/2 oz DeKuyper Butterscotch Schnapps in a shot glass. Take a glass of Red Bull and fill the glass half full or as much needed to cover the shot glass. Put the shot glass of Crown and Butterscotch in the glass of Red Bull and bottoms up!
Of interest, you will get quicker, friendlier service at a bar if you know how to ask for your favourite drink. Learn How to Order a Drink at the Bar at EnglishClub.