have rocks in (one's) head

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To be thoroughly stupid, crazy, absurd, incorrect, etc. You must have rocks in your head if you think the bank will approve you for another loan.

Name	Pronounced	Usage
Arno	-	Dutch, German
Eudokia	-	Ancient Greek
Gratien	-	French
Marinko	-	Croatian, Serbian
Thor	THOR (English), TOR (Danish), TOOR (Swedish, Norwegian)	Norse Mythology, Danish, Swedish, Norwegian
Klopas	-	Biblical Greek