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/Sounds like 'sehr oon KRAK'/

To be exceptional at something, an absolute star. In Spain and Latin America, ser un crack means you're top-tier — at work, at sports, at life — and the person saying it genuinely means it as high praise.

Example

"Eres un crack, en dos horas terminaste lo que yo en dos días."

"Mi profesora es un crack, explica todo clarísimo. → You're a total star, in two hours you finished what took me two days."

"My teacher is a crack, she explains everything crystal clear."

Word family
Regional synonyms:

Recordar que no todo el mundo se deja manipular. Se dice cuando alguien intenta engañar a quien ya lo conoce bien.