slip of the tongue; verbal mistake
Refers to accidentally saying the wrong word or phrase. Often used in everyday conversation about misspeaking.
That slip of the tongue earlier was embarrassing.
I made a verbal slip-up and got laughed at in the meeting.
Refers to a gaffe or indiscreet remark, often with social or political consequences, not just a simple verbal slip.
Standard kanji spelling for this noun.
Mixed kana-kanji spelling sometimes seen in less formal writing.
Compound of 言い (continuative form of 言う 'to say') + 間違え (continuative form of 間違える 'to make a mistake').