When it comes to describing an inferior beer, there are a variety of synonyms available. Some may describe the beer as "watered-down" or "weak," while others may use terms like "sour" or "stale" to describe its flavor. Words like "cheap," "low-quality," or "poorly brewed" could also be used to characterize a subpar beer. Another approach might be to focus on the overall experience of drinking the beer, using phrases like "lacking in depth" or "uninspired." Ultimately, the choice of terminology is up to the individual and depends on the specific qualities of the beer being considered.