
Have a screw loose
Informal Speech
Use 'have a screw loose' in casual conversations, but not in formal or serious situations.
My neighbor talks to plants; I think he may have a screw loose.
Not Offensive
It is a humorous phrase and not usually meant to offend, but be careful as some may find it insensitive.
She believes in aliens and ghosts; some say she has a screw loose.
Not Literal
The phrase is a metaphor and does not refer to actual screws or repair work.
He juggles fruit at the bus stop like he's got a screw loose.