The phrase "against regulations" can be used in various contexts, such as breaking the rules, violating the policies, or going contrary to the norms. There are several synonyms that can replace this term depending on the situation, including non-compliant, unauthorized, prohibited, unlawful, illegal, and illicit. These terms denote activities or behavior that are not allowed or acceptable within a particular framework, whether it be formal or informal. Moreover, words like unapproved, frowned upon, discouraged, and taboo can also be used to describe actions or decisions that are not in line with the established guidelines or standards. Ultimately, the use of these synonyms helps to communicate the seriousness and consequences of actions taken against regulations.