Add vodka, gin, rum, tequila, triple sec, and sweet and sour mix. Shake about 10 seconds to chill.
Strain into a tall glass packed with fresh ice.
Gently pour in blue curaçao, raspberry liqueur, and melon liqueur.
Add a splash of lemon juice and give a careful stir to achieve the signature green hue.
Notes
Fruity yet strong: the blue curaçao and melon liqueur add tropical notes, raspberry brings berry sweetness, and the sweet-and-sour keeps it bright. For a lighter take, add a splash of club soda. Garnish with a lemon or lime wedge if desired.