The phrase "dirty deeds" refers to dishonest or unethical actions. Some antonyms for "dirty deeds" could include "honorable deeds," "noble actions," or "upright behavior." Doing something with integrity and moral fiber is the antithesis of committing dirty deeds. You might also consider "fair play," "rectitude," or "wholesome conduct" as antonyms for dirty deeds. These words all refer to action that is conducted with the intent of doing good, rather than doing harm or deceiving others. In short, the opposite of dirty deeds is clean, ethical behavior.