rocks in one's head, have

Show poor judgment, act stupidly, as in If you think that's an accurate summary, you've got rocks in your head. The rocks in this idiom are a supposed substitute for brains. [Slang; 1940s]

Common Names:

Name	Pronounced	Usage
Zelde	-	Yiddish
Barry	BAR-ee, BER-ee	Irish, English
Devaraj	-	Indian, Kannada
RozÁLia	-	Hungarian
Sarnai	-	Mongolian
Mila	-	Russian, Ukrainian, Bulgarian, Czech, Serbian, Croatian, Macedonian