Idiom meaning, usage examples, facts

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OUT TO LUNCH

absent-minded, unaware or confused (1); ignorant on some topic (2); harmlessly crazy or out of touch with reality
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1. I can’t believe I was so absent-minded that I erased my entire hard drive! I’m really out to lunch.
2. You don’t know what you’re talking about! You’re out to lunch.

Antonym: on the ball. Compare to: know if (one) is coming or going (opt.1); know beans about (something); all wet, for the birds (opt.2); bats in (one’s) belfry; off (one’s) rocker; screw loose, have a (opt.3).


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