fuck up /ˌfʌkˈʌp/verb 8exclamation 1forms 3 verb8 •(slang, vulgar) To make a mistake, to go wrong.You really fucked up this time.Don't you fuck up again. •(vulgar) To botch or make a mess of.I fucked up question 3 of the exam.Don't fuck up your arcade game. •(vulgar) To injure or damage badly.I fucked up my knee while running the marathon.I'm about to fuck somebody up for betrayal. •(vulgar) To traumatise; to negatively affect the wellbeing of someone.They fuck you up, your mum and dad. They may not mean to, but they do. They fill you with their faults they had And add some extra, just for you. — 1971 •(vulgar) To cause someone to become intoxicated or otherwise alter someone's mental state.I really got fucked up on cocaine last night. — 2001 •(vulgar) Ellipsis of shut the fuck up.Fuck up, mate! I don't want to listen to you! •(slang, vulgar) Synonym of crack up (“to cause to laugh”)This video is fucking me up so bad. •(slang, vulgar) Synonym of destroy (“to eat food quickly, hungrily or completely”)I could fuck up a burger right now. exclamation1 •(informal, vulgar) Ellipsis of shut the fuck up.Will you just fuck up? I can't hear. formsfucked up · fucking up · fucks up