"More shooin" is not a word in the English language. However, the word "shoo-in," which means a person or thing that is certain to succeed, has antonyms such as underdog, long shot, and risk. An underdog is a person or thing expected to lose or fail in a competition or situation. A long shot is an attempt or possibility that is not likely to succeed. Risk is the probability or potential danger, loss, or harm that comes with a decision or action. Thus, if there is a shoo-in candidate for a job or an election, the opposite of this certainty is an underdog, a long shot, or a risk.