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

Dictionary Entries Near have a loose screw

have a look

have a loose screw

have a lot in common

See More Nearby Entries 

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 6 Dec. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Name that Thing: Flower Edition

Spell It

Can you spell these 10 commonly misspelled words?

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!