Antonyms for the term "expert opinion" include uninformed views, ignorant beliefs, unqualified ideas, and amateur analysis. These antonyms refer to information and judgments that lack depth and accuracy. They are often made by individuals who have insufficient knowledge, experience, or expertise in the subject matter at hand. Alternatively, some antonyms for expert opinion include popular opinion, general knowledge, and common sense. While these can sometimes provide useful insights, they do not necessarily carry the weight of a well-informed, evidence-based, and professional perspective. Therefore, it is important to distinguish between expert and non-expert sources of information when considering important decisions and evaluations.