The phrase "not cricket" is used to describe something that is unfair or unjust. There are several synonyms for this term, including "unfair," "unjust," "dishonest," "fraudulent," "deceptive," "underhanded," and "sneaky." These words all describe actions that go against fair play and sportsmanship. Other synonyms for "not cricket" could include "unsportsmanlike," "cheating," "unsavory," "shady," and "deceitful." These words are often used to describe situations in which someone is acting in a way that is contrary to the rules of a game or activity, or when someone is behaving in an unethical or dishonest way in order to gain an advantage.