Meaning of the word "out to lunch" in English

What does "out to lunch" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

out to lunch

US /aʊt tə lʌntʃ/
UK /aʊt tə lʌntʃ/
"out to lunch" picture

Idiom

1.

not paying attention; crazy or eccentric

Example:
He seems a bit out to lunch today, not really following the conversation.
Her ideas are so out to lunch that nobody takes them seriously.
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