listen to the pronunciation of slip-up
Englisch - Englisch
A mistake or error; a minor misstep

I think she will forgive an accidental slip-up, so don't worry too much about misspeaking.

A slip-up is a small or unimportant mistake. There's been a slip-up somewhere = slip. a careless mistake
To err, falter; to make a mistake

I hope I don't slip up during my presentation.

{f} make a mistake, make an error, fail
If you slip up, you make a small or unimportant mistake. There were occasions when we slipped up see also slip-up
make an error; "She slipped up and revealed the name"
{i} error, blunder, mistake