bad taste in one's mouth

The phrase "bad taste in one's mouth" is an idiomatic expression commonly used to describe a feeling of unpleasantness, disappointment, or dissatisfaction about something. It typically refers to a negative experience or impression that lingers, similar to the unpleasant taste one would have after eating or drinking something bitter or distasteful. Figuratively, it suggests a lingering negative feeling or perception about a specific situation, person, comment, event, idea, or outcome.