Meaning of “it's your own lookout” in the English Dictionary

british dictionary

"it's your own lookout" in British English

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it's your own lookout

UK informal

used to tell someone that they are responsible for their own problems:

It's your own lookout if you're not properly insured.

(Definition of “it's your own lookout” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)