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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.

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

From MarketWatch Jul. 1, 2026

On the particular afternoon that Camille is out to lunch with Irene and Lisa, she’s feeling similarly unhappy.

From Salon Feb. 18, 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

The next year, colleagues took her out to lunch and brought a cake for her 101st birthday.

From Los Angeles Times Jun. 8, 2023

“No sweats, okay? I’m going out to lunch with Fiona.”

From "The Running Dream" by Wendelin Van Draanen

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