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to have rocks in one's head
01
to be very foolish or stupid
![to [have] rocks in {one's} head definition and meaning](https://cdn.langeek.co/photo/42228/original/?type=jpeg "to [have] rocks in {one's} head definition and meaning")
Humorous
Idiom
Informal
Example
Do n't listen to his advice on financial matters.
I ca n't believe he invested all his savings in that risky business venture.
Palabras Cercanas
