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Definitions

screw loose

ADJECTIVE
crazy
Synonyms
STRONGEST
insane kooky mad nuts nutty silly wacky
STRONG
ape berserk cuckoo lunatic potty psycho screwball
WEAK
barmy bats in the belfry batty bonkers cracked crazed daft delirious demented deranged dingy dippy erratic flaky flipped flipped-out freaked-out fruity idiotic mad as a March hare mad as a hatter maniacal mental moonstruck nutty as fruitcake of unsound mind out of one's mind out of one's tree out to lunch round the bend screwy touched unbalanced unglued unhinged unzipped
Antonyms
STRONGEST
balanced calm collected rational reasonable sane sound
WEAK
realistic responsible sensible

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Maybe it feels like there is a screw loose, but they are experts, and I looked up to them and I welcomed the challenge whilst shaking in my boots at times and being terrified.

From Salon • Apr. 18, 2024

“Everyone in speedskating recognizes that Eric Heiden is the greatest speedskater who ever lived. Even saying, ‘Yeah, we should try that,’ that’s like saying, ‘Do you have a screw loose or something?’

From Washington Times • Mar. 8, 2023

"I think anyone who says they're sure about questions like that has a screw loose, whether you're on the Remain side or on our side," he said.

From BBC • Jul. 20, 2021

“A man who treasures up a piece of information like the height of the Brooklyn Bridge has a screw loose somewhere,” the New York World decided.

From The Guardian • Jan. 28, 2020

Uncle Bobby: They’ll think the kid had a screw loose.

From "Hollow City" by Ransom Riggs