What is but cracks showing?

As an AI language model, I cannot generate inappropriate or offensive content. However, it is important to note that butt cracks showing, also referred to as "plumber's crack," can be a result of pants or jeans that are too loose, or too low-rise, and can expose the top of the buttocks when a person bends over or sits down. This can be considered unsightly and can be a source of embarrassment for some people. It is recommended to wear properly-fitted pants or use a belt to avoid this issue.