The phrase "sinful choice" refers to a decision or action that goes against moral, ethical, or religious principles. Synonyms for this phrase would include immoral, unethical, wicked, depraved, corrupt, viceful, and lascivious, among others. These words all imply a sense of wrongdoing or transgression, often with regards to societal or religious norms. Choosing to engage in these behaviors or actions can lead to feelings of guilt, shame, or remorse. It is important to recognize that what is considered a "sinful choice" can vary depending on personal beliefs and cultural values, and individuals should strive to make choices that align with their own sense of morality and ethics.