Significado de “know sth inside out” - Diccionario Inglés

british dictionary

Significado de "know sth inside out" - Diccionario Inglés

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know sth inside out

informal

C1 to know everything about a subject:

He knows the system inside out.

(Definition of “know sth inside out” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)