1. screw loose - Noun
2. screw loose - Adjective Satellite
not behaving normally
Source: WordNetscrew-loose
I am a misanthrope and yet utterly benevolent, have more than one screw loose yet am a super-idealist who digests philosophy more efficiently than food. Alfred Nobel
I think it has sullied his presidency. As brilliant a politician as Bill Clinton is, as magnetic a personality as he can be, there is one little screw loose somewhere. Morley Safer
To enjoy being famous, you need to have a screw loose. Diablo Cody