Piggy in the middle is a popular game played by kids, but it is also an idiom that refers to someone who is stuck in the middle of two opposing parties. There are several synonyms for piggy in the middle, including monkey in the middle, center stage, and sandwiched between. These terms properly describe the situation where someone needs to negotiate between two equally powerful and opposing groups. In some cases, the person in this position may have to choose a side or find a middle ground. Whether it's in a game or a real-life situation, being piggy in the middle can be a challenging position to be in.