Tipsters are individuals who offer advice, recommendations, and inside information about a particular field. Antonyms for the word 'tipster' are those who lack knowledge or expertise in a given area, individuals who deliberately spread misinformation, or those who withhold valuable information. Ignorants, novices, and incompetent individuals might be antonyms for tipsters because they lack adequate experience or knowledge in a field of interest. Hoaxers, liars, and charlatans may also be antonyms for tipsters as they provide false information to manipulate or deceive others. While tipsters are often sought out for their insights and expertise, the opposite of a tipster can lead to misinformation, confusion, and poor decision-making.