The term 'BAD ACT' can be broken down into three crossword solutions: SIN (3 letters), CRIME (5 letters). A SIN is an immoral act that is considered to be a violation of religious or moral law. It is usually seen as an offense against God or the gods. Crimes, on the other hand, are acts that are illegal and punishable by law. They are offenses against society and can include both misdemeanors and felonies. Therefore, a bad act can refer to either a SIN or a CRIME, depending on the context.