The phrase "put up job" means a deceptive and premeditated hoax or conspiracy. The antonyms for this phrase would include words such as genuine, authentic, legitimate, and sincere. These words carry the opposite meaning of a fabricated or staged situation. A genuine situation is natural and unforced, lacking any intentional manipulation or deceit. An authentic situation is founded on honest principles and conforms to the truth. Likewise, a legitimate situation is one that is lawful, morally acceptable, and justifiable. These antonyms for "put up job" emphasize the importance of honesty, transparency, and trust in personal and professional relationships.