Carpet rat is a colloquial term used to describe a person who spends a lot of time at home, usually sitting or lying on the carpet. Synonyms for this word include couch potato, homebody, layabout, and slacker. A couch potato is someone who spends most of their time watching television or doing something unproductive. Homebody refers to someone who enjoys being at home and prefers quiet activities. Layabout and slacker both describe someone who is lazy and lacks motivation. These terms may not be flattering, but they are useful when trying to describe someone who spends a lot of their time at home.