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
Lillie	LIL-ee	English
Amando	ah-MAHN-do (Spanish, Italian)	Portuguese, Spanish, Italian
Roberta	[rəu'bə:tə]
Geir	-	Norwegian, Icelandic
Basya	-	Hebrew
MÁIrÍN	MOI-reen, MAW-reen	Irish