get one's head examined

get one's head examined idiom
Also, have one's head examined. One is crazy or absolutely wrong. For example, You like this food? Go get your head examined, or If you believe that story, you should have your head examined. This hyperbolic and usually jocular expression of disagreement may, thought Eric Partridge, allude to the now discredited field of phrenology, which holds that the configurations of the skull reveal mental and emotional characteristics. [Early 1900s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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