The term 'barbecue seasoning' can be summarized by the three-letter word 'RUB'. A RUB is a combination of herbs, spices, and other ingredients that are used to season food before or during cooking. Rubs are often used to add flavor to grilled or smoked meats, such as pork, beef, and chicken. They can also be used to season vegetables, fish, and other dishes. Rubs are typically applied directly to the food before cooking, and can be used to create a flavorful crust on the outside of the food.