slip-up

slip-up
ˈslip-up noun [countable]
a careless mistake:
    We cannot afford another slip-up.
     

THESAURUS

   ▪ mistake something incorrect that you accidentally do, say, or write: a spelling mistake | I made a mistake – it should say £230, not £320.
   ▪ error formal a mistake: an error in the report | grammatical errors | He had made a serious error on his tax form.
   ▪ misprint a small mistake in something that is printed: There was a misprint in the article, and instead of ‘pleasant’ it said ‘pheasant’.
   ▪ typo informal a mistake in something that has been typed or printed: I spotted a couple of typos in the letter.
   ▪ inaccuracy formal a piece of information that is not completely correct: The report contained several inaccuracies.
   ▪ mix-up a careless mistake in which one name, time, address etc has been confused with another, so that the details of something are wrong: There was a mix-up over the train times and I missed my train.
   ▪ slip-up a careless mistake when you are doing something: The other team took advantage of the goalie’s slip-up.
   ▪ oversight a mistake in which you forget something or do not notice something: Through some oversight, the brochures were not ready by the right date.
   ▪ a slip of the tongue a mistake in which you accidentally say a similar sounding word: When I said Thursday, I meant Tuesday. It was a slip of the tongue.
   ▪ faux pas /ˌfəʊ ˈpɑː, ˈfəʊ pɑː $ ˌfoʊ ˈpɑː/ formal an embarrassing mistake in a social situation, when you do or say something that you shouldn’t: Harris, trying to be funny, addressed the waiter as ‘boy’. A deathly silence followed this faux pas.

slip-upBrE /ˈslɪp ʌp/ 🔊NAmE /ˈslɪp ʌp/ 🔊 noun (informal) a careless mistake 疏漏；差错