The phrase "flop joint" is an informal term that typically refers to a low-quality or rundown establishment, particularly a restaurant or bar. Some possible synonyms for this phrase might include "dive," "hole-in-the-wall," "seedy establishment," "shabby joint," "ramshackle bar," or "cheap motel." These words all convey a sense of disrepute, disrepair, or general unattractiveness, and they can be used to describe everything from seedy bars to rundown diners and more. Whether you're searching for the perfect phrase to describe a dingy motel or a grungy pub, there are plenty of synonyms for "flop joint" that can help you paint a vivid picture of an unsavory or unpleasant place.