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"Ешьте на здоровье" - это иногда шуточное "и вам спасибо".
"Eat a lot to improve your health" is a humorous "and thank you".
ironic. sometimes used as a joke "don't choke on your food".

Ah, that makes much more sense. Google failed big time on this one!!!

Sometimes translators get into a stupor, can not make a translation of the word