Meaning of “know what you are doing” in the English Dictionary

american-english dictionary

"know what you are doing" in British English

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know what you are doing

to have the skills and knowledge to do something effectively:

You don't need to tell me - I know what I'm doing!

(Definition of “know what you are doing” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"know what you are doing" in American English

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know what you are doing

to have the knowledge or experience that is necessary to do something:

Don’t worry about me – I know what I’m doing!

(Definition of “know what you are doing” from the Cambridge Academic Content Dictionary © Cambridge University Press)