Dumb clucks is a term used to describe people who are not very intelligent. BIRDBRAINS (10 letters) is a slang term for someone who is not very bright, CLODS (5 letters) is another word for someone who is clumsy or stupid, NITWITS (7 letters) is a term used to describe someone who is foolish or silly, and schmos (6 letters) is a slang term for someone who is not very smart. All of these terms can be used to describe someone who is a dumb cluck.