Meaning of “too big for your boots” in the English Dictionary

English

"too big for your boots" in English

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too big for your boots

UK US too big for your britches informal

behaving as if you are more important than you really are:

He's been getting a bit too big for his boots since he got that promotion.

(Definition of “too big for your boots” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)