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English definition of “boo”

boo

verb [I or T]     /buː/ (present participle booing, past tense and past participle booed)
to make an expression of strong disapproval or disagreement : People at the back started booing loudly . Her singing was so bad that she was booed off the stage .Disapproving and criticizingDamaging reputation
(Definition of boo verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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