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English definition of “foul (sth) up”

foul (sth) up

informal phrasal verb with foul     /faʊl/ verb
to spoil something by making a mistake or doing something stupid: I don't want David organizing this party after the way he fouled things up last year.Damaging and spoilingDestroying and demolishing
(Definition of foul (sth) up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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