to go away in English way
In Russian, when someone goes away without saying any proper goodbye, we say "he/she goes away in an English way" (уходит по-английски). Do we really have such an expression in English?

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We say “Irish exit” :)

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Maybe we could just say "SHE/HE JUST LEFT."

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(American english): I'm not aware of any such expression for this behavior.

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In the UK we have no such expression. Am quite fascinated to know where 'Irish exit' comes from.