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Synonyms

out to lunch

Idioms  
  1. Not in touch with the real world, crazy; also, inattentive. For example, If he believes that story, he's really out to lunch, or Anne hasn't heard a word you said—she's out to lunch. This expression transfers a temporary physical absence for the purpose of eating to a temporary or permanent mental absence. [Slang; mid-1900s]


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Yesterday, we babysat our granddaughter while our daughter and her husband went out to lunch to celebrate her birthday.

From MarketWatch Jul. 1, 2026

"He picked on a few boys within that group, befriend us, invited us back out to lunch at his family home and slowly over the years became a sort of father figure to me."

From BBC Nov. 12, 2024

“In all likelihood, unless the president is completely out to lunch for some reason or another, either physically or mentally, the office itself functions.”

From Los Angeles Times Jul. 24, 2024

Similarly, "Pretty Vacant" conveys the emptiness of a conformist, consumer-driven society that is perpetually out to lunch.

From Salon Jan. 30, 2024

“This Jones goes out to lunch from twelve to twelve- thirty. So you come around about twelve-forty-five.”

From "A Confederacy of Dunces" by John Kennedy Toole

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