1) Chips and such 2) Snack food 
Junk food is a derisive slang term for food that is of little nutritional value and often high in fat, sugar, salt, and calories. It is widely believed that the term was coined by Michael Jacobson, director of the Center for Science in the Public Interest, in 1972. Junk foods typically contain high levels of calories from sugar or fat with little ...
(from the article `Confronting Childhood Obesity`) ...but it was clear that most fat children got that way because they ate too much and exercised too little. Many child health experts believed that ...
Junk food is British slang for unsophisticated food of a perceived low nutritional value.
[n] - food that tastes good but is high in calories having little nutritional value
British slang for unsophisticated food of a perceived low nutritional value.
noun food that tastes good but is high in calories having little nutritional value
food, as potato chips or candy, that is high in calories but of little nutritional value. · anything that is attractive and diverting but of negligible substance: the junk food offered by daytime television.