What is the ruling on one person saying to another “Eat air (i.e., shut up)” as a put-down?

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Check below answers in case you are looking for other related questions:
Ruling on defending the honour of the kuffaar
Is it permissible to go to beaches where there is nakedness and free mixing?

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Related Answers:
It is haraam to sell an item without pointing out its faults, even if he is selling it to a kaafir
He incited a woman to leave her husband, then he married her and claimed that her son from her first husband was his child
Thinking about immoral actions
Ruling on defending the honour of the kuffaar
Is it permissible to go to beaches where there is nakedness and free mixing?

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