The phrase "bad taste" has a multitude of synonyms, each conveying a slightly different meaning. Among the most commonly used is "unpalatable," which suggests an unpleasant flavor or aftertaste. "Offensive" implies that the taste is so bad that it's offensive to the senses. "Repugnant" evokes a visceral sense of disgust, while "vile" suggests moral repugnance. "Disgusting" has a similar connotation, but with the added implication of physical revulsion. "Nauseating" implies an effect on the stomach itself, while "sickening" suggests a more general sense of discomfort. "Rancid" specifically applies to spoiled food, while "tainted" suggests contamination. Whether discussing food or metaphorical taste, these synonyms provide a range of options to accurately describe an unpleasant sensation.