be soft in the head
To be dumb, foolish, or witless. You sold the car and bought a scooter? Are you soft in the head? Tommy's a good kid, but he's a little soft in the head. You can't tell people you want to start a business selling bees as pets—they'll think you're soft in the head!
go soft in the head
To become dumb, foolish, or witless. You sold the car and bought a scooter? Have you gone soft in the head? Tommy's a good kid, but I think he's gone a little soft in the head. You can't tell people you want to start a business selling bees as pets—they'll think you've gone soft in the head!
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