Wordnet 3.0
NOUN (1)
1.
an accidental and usually trivial mistake in speaking;
The Collaborative International Dictionary of English v.0.48:
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]
WordNet (r) 3.0 (2006):
slip of the tongue
n 1: an accidental and usually trivial mistake in speaking
Moby Thesaurus II by Grady Ward, 1.0:
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