trip-up

(noun) an unintentional but embarrassing blunder. Synonyms: trip, stumble, misstep. Examples: "He recited the whole poem without a single trip." "He arranged his robes to avoid a trip-up later." "Confusion caused his unfortunate misstep."

(verb) detect a blunder or misstep. Synonyms: trip up, catch. Example: "The reporter tripped up the senator."

(verb) cause to stumble. Synonyms: trip, trip up. Example: "The questions on the test tripped him up."

(verb) make an error. Synonyms: stumble, slip up, trip up. Example: "She slipped up and revealed the name."