Nachos are a Tex-Mex culinary dish consisting of tortilla chips or totopos covered with cheese or cheese sauce, as well as a variety of other toppings and garnishes, often including meats (such as ground beef or grilled chicken), vegetables (such as chili peppers, lettuce, tomatoes, and olives), and condiments such as salsa, guacamole, or sour cream. At its most basic form, nachos may consist of merely chips covered with cheese (usually cheddar or American cheese), and served as an appetizer or snack, while other versions are substantial enough to serve as a main course.
https://en.wikipedia.org/wiki/Nachos