slip-up

Definition of Slip-up in English :

a minor inadvertent mistake usually observed in speech or writing or in small accidents or memory lapses etc.

WordNet Lexical Database for English. Princeton University. 2010.

Slip-up

verb (intr, adverb)

1. informal

to make a blunder or mistake; err

2.

to fall over

he slipped up in the street

noun slip-up

3. informal

a mistake, blunder, or mishap

noun

a mistake, blunder or mishap

There's been a slip-up somewhere.

The girls had made three crucial slip-ups.

to make a mistake; be in error

noun Informal

1.

an error or oversight

2.

an unlucky happening; mishap

n.

An error; an oversight.