Fritos are a US snack: small, salty pieces of fried corn, crunchy, and usually sold in a bag. Fritos is a brand name, and Americans often use it for that kind of corn chip. They are not potato chips, and they are not the same as Doritos, which are triangles with a stronger taste on the outside. You will hear the word in casual American talk about food, not in serious writing. Though actually, outside the United States the brand is much less common, so a student in Taiwan is more likely to meet it in a film or on an imported bag than in a local shop.

Fritos（美國玉米脆片品牌；台灣少見，勿和多力多滋搞混）