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
Filippo	-	Italian
Berenice	bər-NEES (English), ber-ə-NEE-see (English), be-re-NEE-che (Italian)	English, Italian, Ancient Greek (Latinized)
Katheryn	KATH-ə-rin, KATH-rin	English
Keshet	-	Hebrew
DionÝZ	-	Slovak
Elixabete	-	Basque