with a screw loose

Having or characterized by silliness, eccentricity, craziness, or mental instability. There's some guy with a screw loose 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 screw loose when I get old.

Common Names:

Name	Pronounced	Usage
Brigit	-	Irish Mythology
Nethaneel	-	Biblical
Elkanah	el-KAYN-ə (English)	Biblical, Biblical Hebrew
MahİR	-	Turkish
Lisa	LEE-sə (English), LEE-zah (German), LEE-sah (Dutch)	English, German, Dutch, Swedish, Norwegian, Danish, Italian
Sif	SEEF (Norse Mythology)	Norse Mythology, Danish, Icelandic