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
Griffith	-	Welsh
Eugeneia	-	Ancient Greek
Theodulus	-	Ancient Greek (Latinized)
Ryker	RIE-kər	English (Modern)
Fearghas	-	Irish, Scottish, Irish Mythology
Brigid	-	Irish, Irish Mythology