Meaning of “be all talk (and no action)” in the English Dictionary

british dictionary

"be all talk (and no action)" in British English

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be all talk (and no action)

also be just talk

used to describe someone who talks about doing something but never does it:

She's all talk when it comes to doing something about the problem.

(Definition of “be all talk (and no action)” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)