not right in the head

A bit crazy

Not right in the head describes someone who seems mentally unstable, irrational, or eccentric.

The phrase is informal and often dismissive rather than clinical: After he quit his job to chase conspiracy theories, his family worried he wasn't right in the head.

It can range from gentle concern to outright insult depending on context.

Related

mistaken · bonkers · lunatic · off one's rocker · irrational · off-kilter · unhinged · out of one's mind · touched · unreasonable · muddled · crazy · round the bend · delusional · mixed up · nutty · bats in the belfry · incoherent

Opposites
mental stability and sanity

not right in the headsane

Mentally healthy, clearheaded

of sound mind · all there · in one's right mind · lucid · compos mentis

judgment and reasoning capacity

not right in the headrational

Governed by logic

reasonable · sensible · sound · level-headed · logical

Family

right, naught, naughty, rightly, righteous, righteousness, rightful, rightfully, headed

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Negative · Everyday, not technical · Rated PG