The word "bangup" is used to describe something excellent or first-rate. However, there are several antonyms for this word that convey the opposite meaning. Some of the antonyms for "bangup" include words such as terrible, awful, lousy, mediocre, and bad. These words describe anything that is of low quality or performance. Furthermore, other antonyms for "bangup" can be ordinary, inferior, imperfect, substandard, or unsatisfactory. These words indicate that something is not up to the expected standard or not worth appreciating. In summary, while "bangup" implies excellence, its antonyms signify mediocrity, inadequacy, and low performance.