A couch potato is a person who spends most of his time sitting or lying down on the couch watching television.
- He has a huge belly. He must be a couch potato.
- That boy is a couch potato. He does nothing but watch TV.
- He is never going to lose weight. He is a couch potato.
- Stop being a couch potato and do something if you want to live longer.
- He is a couch potato. Good luck trying to get his attention.