Most trumped up is a phrase that refers to something that is exaggerated or fabricated. The opposite of most trumped up could be legitimate, authentic, or genuine. These antonyms would describe something that is truthful and sincere, without any exaggeration or manipulation. Another antonym for most trumped up could be realistic, which would indicate that something is based on facts and practicality rather than exaggeration or false claims. Furthermore, the antonym for most trumped up can be credible or trustworthy, which implies that something is believable, reliable, and honest. By using these antonyms, we can convey ideas that are evidence-based, unbiased, and trustworthy.