Slang A person who spends much time sitting or lying down, usually watching television.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "couch potato" in a sentence
"I finally saw what he was looking at — a couch potato lying down behind a roundleaf bush and looking like a ponypile with fur."