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  • slip-up
    slip-up
    noun
    a mistake, blunder, or oversight.
  • slip up
    slip up
    verb
    to make a blunder or mistake; err
Synonyms

slip-up

American  
[slip-uhp] / ˈslɪpˌʌp /

noun

  1. a mistake, blunder, or oversight.

    Several slip-ups caused a delay in the delivery of the books.

    Synonyms:
    bungle, lapse, error

slip up British  

verb

  1. informal to make a blunder or mistake; err

  2. to fall over

    he slipped up in the street

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. informal a mistake, blunder, or mishap

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
slip up Idioms  
  1. Make a mistake, blunder, as in I slipped up and gave the invitations to the wrong people. [Mid-1800s]


Etymology

Origin of slip-up

First recorded in 1850–55; noun use of verb phrase slip up

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Nixon also makes a notable slip-up in one of the speech’s key moments.

From Barron's • May 7, 2026

Instead, the bit reduced a palpable slight to just another funny slip-up.

From Salon • Mar. 6, 2026

The authors suggest approaching each slip-up with curiosity rather than judgment.

From The Wall Street Journal • Feb. 27, 2026

England may have dodged an embarrasing slip-up here, but will be aware things are not going to get any easier.

From BBC • Oct. 15, 2025

Kelsea has email access on her phone, but I’m still worried about anything being traced, especially after my slip-up with Nathan.

From "Every Day" by David Levithan

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