Meaning of “not do sb any favours” in the English Dictionary

british dictionary

"not do sb any favours" in British English

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not do sb any favours

to do something that is likely to have a bad effect on you or on another person:

You're not well, and you're not doing yourself any favours by taking on extra work.
[ by + -ing verb ] The government isn't doing the families of the victims any favours by hiding the truth about what really happened.

(Definition of “not do sb any favours” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)