{v. phr,}, {slang} To act in a strange way; to be foolish. * /Now I know he has a screw loose - he stole a police car this time./ * /He was a smart man but had a screw loose and people thought him odd./
HAVE A SCREW LOOSE
Meaning of HAVE A SCREW LOOSE in English
Dictionary of English idioms . Словарь английских идиом. 2012