define: cheesy
The definition of cheesy is something that smells or feels like cheese, or something that is made with poor quality, or something that is corny or foolish. A dish of macaroni and cheese would be described as a cheesy main dish. A knife that falls apart when you use it is an example of something that would be described as cheesy. A corny, foolish smile is an example of something that would be described as cheesy.