have a loose screw

idiom

Definition of have a loose screw

informal
: to be crazy You've got to have a loose screw to think that's a good idea. You've got to have a few loose screws to think that's a good idea.

Learn More about have a loose screw

Statistics for have a loose screw

Cite this Entry

“Have a loose screw.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/have%20a%20loose%20screw. Accessed 29 Nov. 2020.

Comments on have a loose screw

What made you want to look up have a loose screw? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

A Thanksgiving Word Quiz

  • a traditional thanksgiving dinner
  • November comes from a word for which of the following numbers?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Syn City

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!