"My husband is a couch potato. He sits in front of the TV all day long."
"You have a huge belly because you're a couch potato."
"I should be more active and less of a couch potato."
A: "James. We're going to play basketball. Do you want to play?"
B: "No, I'm going to watch TV today."
A: "You did that all day yesterday. You better stop being a couch potato or you're going to get a big fat belly."