From Longman Dictionary of Contemporary Englishslip up phrasal verbMISTAKEto make a mistake → slip-up The company apologized for slipping up so badly. on Someone had slipped up on the order. → slip→ See Verb table
Examples from the Corpus
slip up• We'll just have to hope that the other teams slip up.• He slipped up on just one detail.slip on• Not much danger of his Commander letting him slip up on that, he thought drily.slip-upˈslip-up noun [countable] MISTAKEa careless mistake We cannot afford another slip-up.► see thesaurus at mistakeExamples from the Corpus
slip-up• This whole situation only happened because of a slip-up by the bank.• I hope it was a slip-up rather than genuine ignorance.• A slip-up now and an extra, unscheduled recording break will be necessary.• It's a tough league to win and slip-ups at this stage of the season could be fatal.• He also looked over our shoulders while we plotted the charts, watching for any slip-ups.• By then he had made a fatal slip-up, the court was told.• No time for slip-ups, but the odds must now be on Oxford avoiding the drop.• If we are going to win the contract, we can't afford any more slip-ups.• Despite these slip-ups, I came back for another visit.• Despite a few unfortunate slip-ups, we finished on time.From Longman Business Dictionaryslip up phrasal verb [intransitive] to make a mistakeWhere you slipped up was selling to the first bidder. → see also slip-up → slip→ See Verb tableslip-upˈslip-up noun [countable] a careless mistake that spoils a process or planSlip-ups by the company’s management resulted in the launch failure. 