"Hit below the belt" is a commonly used phrase that describes an action considered unfair or unethical. If you are looking for alternatives to this phrase, there are several synonyms that can be used to convey similar meanings. These include "strike a low blow," "cross the line," "go too far," "take liberties," "act inappropriately," "be uncalled-for" or "violate the rules." The use of these synonyms can help you to express yourself more effectively, while avoiding the repetition of common phrases. When communicating with others, using alternative synonyms to "hit below the belt" can help you to communicate your thoughts and objections in a more clear and impactful manner.