Meaning of bum note | Babel Free

Definitions

1. A note that is played incorrectly.
   derogatory, slang
2. A social or conversational mistake; an awkward or inappropriate action.
   derogatory, figuratively, slang

Examples

“'I'm going for a pint.' Declan paused on the way out. 'You really think Ethan's that good? There could be money in it?' He realised he had struck a bum note.”

CEFR level