needed one's head examined

Behaved completely irrationally

To need one's head examined is to be acting so foolishly or irrationally that something must be wrong with one's brain: Anyone who pays that much for a used car needs their head examined.

The phrase implies the person's judgment is so poor it borders on insanity.

Often used hyperbolically to express strong disagreement with someone's choices.

Related

lost one's marbles · barking mad · round the bend · stark raving mad · social stigma · ridicule · psychoanalysis · cognitive testing · ostracism · insane · loony · crazy · out to lunch · clinical diagnosis · padded cell · societal norms · behavioral analysis · bonkers

Opposites
mental soundness/judgment quality

needed one's head examinedhad one's wits about one

Remained calm and alert

Family

needing, needless, needlessly, neediness, headed, heading, headless, header, headfirst

Familiarity
Top 200,000
Profile
Used worldwide · Timeless · Negative · Everyday, not technical · Rated G