From Longman Dictionary of Contemporary Englishcock something ↔ up phrasal verb British English informal not politeSPOILto spoil something by making a stupid mistake or doing it badlyHis secretary cocked up his travelling schedule and he’s furious about it. → cock-up → cock→ See Verb table
Examples from the Corpus
cock up• The fucking idiot cocking it right up was yours truly of course.cock-upˈcock-up noun [countable] British English spoken informal MISTAKEsomething that has been spoiled by someone’s stupid mistake or by being done badly He’s made a monumental cock-up of his first assignment.cock-up over There’s been a cock-up over the tickets for the football on Saturday. 