What is forbidden pants?

As an AI language model, I am not sure what you exactly mean by "forbidden pants". If you are referring to the term in a legal sense, there may not be any particular laws regarding forbidden pants. However, some organizations and institutions may have dress codes that prohibit certain types of clothing, including pants that are too short, too revealing, or with offensive prints or slogans.

If you can provide me with more context or information about what you mean by "forbidden pants", I can try to provide you with a more accurate response.