1. Home
2. Idioms
3. with a loose screw

with a loose screw

---

---

with a loose screw

Having or characterized by silliness, eccentricity, craziness, or mental instability. There's some guy with a loose screw standing on the corner yelling obscenities at passersby. I have this strange fear that I'm going to turn into a lonely old bachelor with a loose screw when I get old.

See also: loose, screw