soft in the head

Idioms  

1. Mentally deficient; also, silly, foolish. For example, He's nice enough but a bit soft in the head. The soft in this idiom, first recorded in 1775, alludes to a weakness in mental capacity.

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Example Sentences

Now don’t go all weak at the knees and soft in the head when you read this:

From Los Angeles Times • Jan. 11, 2025

Some critics contend that the whole movement was soft in the head.

From Time Magazine Archive

Citing absentmindedness and a general vagueness, he says, "I think I'm probably going a little soft in the head, which is why I have something in common with Chance."

From Time Magazine Archive

The bedtime reading of scientists gone soft in the head?

From Time Magazine Archive

She gazes off like she’s gone soft in the head.

From "The Help" by Kathryn Stockett