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English definition of “sb's heart is in their boots”

sb's heart is in their boots

UK informal
If someone's heart is in their boots, they feel very sad, disappointed, worried, etc.: Their hearts were in their boots when they realized that they would have to do the work all over again.Feeling sad and unhappy
(Definition of sb's heart is in their boots from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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