slip of the tongue ------- 口误(成语)
英文释义 (IDIOM) To say something by mistake; to make a mistake or reveal a secret without intending to do so.
例句 Yesterday my brother made
a slip of the tongue and called his new girlfriend by the name of his former girlfriend.
昨天,我兄弟出现了
口误,用前女友的名字称呼他的新女友。