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Definition of Slip up
1. Verb. Make an error. "She slipped up and revealed the name"
Exact synonyms: Stumble, Trip Up
Generic synonyms: Err, Mistake, Slip
Derivative terms: Slip-up, Stumble, Stumbler, Trip-up
Generic synonyms: Err, Mistake, Slip
Derivative terms: Slip-up, Stumble, Stumbler, Trip-up
Definition of Slip up
1. Verb. (idiomatic) To err, falter; to make a mistake. ¹
¹ Source: wiktionary.com