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sb's heart/mind/pulse races

Definition

If your heart/mind/pulse races it works extremely fast because of excitement, drugs, illness, etc.: She was hot and sweaty and had a racing heart. A glimpse of his bare torso set my pulse racing.Excited, interested and enthusiastic
(Definition of sb's heart/mind/pulse races from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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