1. slip-up - Noun
2. slip-up - Verb
a minor inadvertent mistake usually observed in speech or writing or in small accidents or memory lapses etc.
make an error
Source: WordNetslip up
She slipped up and revealed the name Source: Internet
Any slip-up now would prove to be extremely costly for either of the three sides who are contesting for the continental spot. Source: Internet
As Alya tried to assure Yasmeen that Geoff will slip up, Yasmeen wouldn’t believe her and is certain that he will continue to evade justice – meaning she would rather stay in prison where he can’t hurt her. Source: Internet
Bailey said that this will involve avoiding using these informants to the point where they suffer burnout and begin to slip up, allowing the drug manufacturers to determine they are informants and either shun them or, worse yet, kill them. Source: Internet
If we can peg back our game in hand we will be within four points of Heriot’s and looking for them to slip up. Source: Internet
Biden, known as prone to gaffes, did not slip up in his let-them-eat-code remarks but expanded upon a consistent theme of his presidential campaign. Source: Internet