false note

About 0.10 uses per million words.

Meaning

1. noun An incorrect note which is sung or played in a musical performance.
2. noun Of a remark or narrative, an indication (as discerned by the listener or reader) of untruth, insincerity, or inconsistency.
3. noun Of a non-verbal display or presentation, an indication of incongruity or inappropriateness.

Similar words

off-note mistune semi-harmonic domino flatting misfact mistuning sour note faux pas misbeat