Trail mix of raisins, nuts, and chocolate is known in the US by the four-letter acronym GORP.
GORP is a traditional North American name for trail mix, especially among hikers and campers. The mixture is valued because dried fruit supplies quick carbohydrates, while nuts contribute fats, protein, and calories in a lightweight, portable form. Chocolate is a common addition, though modern blends may also contain granola, seeds, pretzels, cereal, or dried cranberries.
The acronym is often expanded as “good old raisins and peanuts,” but that explanation is not certain. The Oxford English Dictionary records “gorp” as a verb meaning to eat greedily in a 1913 reference, suggesting the word may have existed before the backronym became popular. The snack itself also has a long outdoor history: camping writer Horace Kephart recommended combinations of nuts, raisins, and chocolate in the 1910s.
GORP is sometimes treated as a strict recipe, but there is no universal ingredient list. In Australia and New Zealand, a similar snack is commonly called scroggin, while many European countries use names such as student mix.