having a bitter feeling

The Spanish phrase 'tener un sentimiento amargo' translates to 'having a bitter feeling' in English. This phrase could be used in a variety of contexts; it might refer to the sour emotion one feels after a disappointing event, for example, or an unpleasant taste in one's mouth metaphorically due to a negative experience. It perfectly encapsulates the general taste of disappointment, resentment, or regret.