Fu Manchu’s Magenta Martini
What kind of word consists of “Ng”? This is the Cantonese rendering of Northern Chinese “wu” the word for the numeral ‘5’. The Mandarin name of this drink is Wu Jya Pi, 五加皮 literally “Bark of Five Additions.” 
So Ng Ka Py is the Cantonese name for a Chinese spirit or liqueur that might be an infusion of five kinds of fruit peel. A sort of alcoholic Five-Spice Powder, perhaps?