Definition of “be/go on at sb” - English Dictionary

british dictionary

“be/go on at sb” in British English

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be/go on at sb

UK

to complain to someone again and again about their behaviour or to ask them to do something:

My parents are always on at us about having a baby.
She's been on at me to get my hair cut.

(Definition of “be/go on at sb” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)