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English definition of “cock sth up”

cock sth up

UK slang
verb uk phrasal verb with cock   /kɒk/ us    /kɑːk/
to do something wrong or badly: David cocked up the arrangements and we ended up missing the reception. "How did the exam go?" "Terrible - I panicked and really cocked it up."Failing and doing badly
(Definition of cock sth up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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