The phrase "bad food" is often used to describe food that is unappetizing, unhealthy, or poorly cooked. However, there are a variety of synonyms that can be used to convey this same meaning. Some options might include terms such as "unpalatable," "inedible," "sour," "spoiled," "rancid," or "stale." Additionally, other words that could be used to describe bad food might include phrases such as "unhealthy cuisine," "unappetizing fare," or "poorly prepared meals." Regardless of the specific synonym used, the shared meaning is that the food in question is of poor quality and best avoided.