slip of the tongue n 1: an accidental and usually trivial mistake in speaking
slip of the tongue \slip of the tongue\ n. an unintentional utterance; a mistake in speaking. Syn: slip of the lip. [WordNet 1.5 +PJC]
19 Moby Thesaurus words for "slip of the tongue": balk, bevue, false move, false step, inadvertence, inadvertency, lapse, lapsus calami, lapsus linguae, loose thread, miscue, misstep, omission, oversight, slip, slipup, stumble, trip, wrong step