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English definition of “sit on sb”

sit on sb

informal
verb uk phrasal verb with sit   /sɪt/ (present participle sitting, past tense and past participle sat) us  
to force someone to be silent or not to do something: The boss is going to sit on him to make sure he says nothing.Limiting and restrictingPreventing and impeding
(Definition of sit on sb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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