The term "bag tricks" refers to a variety of sneaky, underhanded methods used to deceive or cheat someone. Some synonyms for this phrase include "dirty tricks," "sneaky tactics," "foul play," and "deceptive maneuvers." These terms all describe actions that are meant to give one person an unfair advantage over another, often through dishonest means. Examples of bag tricks might include stealing an opponent's playbook in a sporting event, using insider information to gain a financial advantage in the stock market, or manipulating a situation to make someone look bad or gain an advantage over them. All of these tactics involve underhanded methods meant to deceive or betray someone's trust.