What does a "bummer" convey about an experience?

A "bummer" typically refers to an experience that is disappointing or unfortunate. When someone describes a situation as a bummer, it conveys a sense of missed opportunities or an outcome that did not live up to expectations. This term captures the feeling of regret or frustration stemming from circumstances that did not work out as hoped.

In contrast, the other options imply positive outcomes or feelings. For instance, describing something as overwhelmingly positive or as leading to significant success reflects enthusiasm and satisfaction, which are the opposite of what a bummer would indicate. Similarly, unexpected joy implies a pleasant surprise, which stands in stark contrast to the disappointment conveyed by the term "bummer."