gyro, a Greek dish of roasted meat served in a pita, usually with tomato, onion, and tzatziki, a cold, creamy sauce made from yogurt, cucumber, garlic, and various spices. Gyro meat—typically lamb, beef, pork, or chicken—is roasted on a vertical skewer and sliced off in thin, crispy shavings as it cooks. The dish is popular around the world, and many variations exist.