""Doritos and Mountain Dew" is a slang expression that has become synonymous with the stereotypical lifestyle of a gamer. It refers to the consumption of these two foods in large quantities during long gaming sessions.

Gaming is a term used to refer to games and everything related to them.
It covers all forms of video games, from computer and console games to mobile apps and online games.
Gaming has become very popular not only among young people, but also among people of different age groups.

Doritos (/dəˈriːtoʊz/) is an American brand of flavored tortilla chips produced since 1964 by Frito-Lay, a wholly owned subsidiary of PepsiCo. The original Doritos were not flavored. The first flavor was Toasted Corn, released in 1966, followed by Taco in 1967 and Nacho Cheese in 1972. Other specialty flavors began to make their debut during the late 1980s."