The name sounds good, if nothing else. "Leche de Tigre," or tiger's milk, is a hangover cure popular in Peru. The concoction is just the marinade that's left over after soaking your ceviche. (Ceviche is a popular Latin and South American seafood appetizer made from soaking fresh, raw fish in lemon and/or lime juice spiced with items such as ají or chili peppers, garlic and ginger.) The name "tiger's milk" comes from the fact that the mixture has a milky color, and is supposedly energizing [sources: Strochlic, Paull, The Guardian].
Leftover raw-fish marinade doesn't sound too appetizing. Luckily, you only need to take a shot of it. Or, if you enjoy ceviche, try pouring it over a serving and ingesting the liquid that way. The juice's acidity and spiciness is what's behind the cure; the claim is that it cuts through the toxins you've accumulated from alcohol consumption, although this has not been scientifically proven [source: MSN].
You can also take your leftover-ceviche-marinade-turned-hangover cure by combining it with some black clams, which will change its color from milky to dusky, and its name to "leche de pantera," or panther's milk. An added bonus: Both leches are said to aphrodisiacs, due to their high concentrations of raw herbs and vitamin C [source: The Guardian]. With names referring to the tiger and the panther, we're not surprised.