Definition of fuck up phrasal verb from the Oxford Advanced Learner's Dictionary

 

fuck up

 phrasal verb
phrasal verb
 
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Phrasal Verbs
to do something badly or make a bad mistake You've really fucked up this time! A more polite way to express this is mess up.
to upset or confuse somebody so much that they are not able to deal with problems in their life My parents' divorce really fucked me up. A more polite way to express this is mess somebody up.
to do something badly or spoil something I completely fucked up my exams. A more polite, informal way of saying this is mess something up.