The phrase "piggies back" is a common idiom used to describe carrying someone on your back. However, there are several synonyms for this phrase, including "back ride," "shoulder ride," "horseback," and "carry-back." These terms all describe the act of giving someone a ride by carrying them on your back or shoulders. Each of these phrases is commonly used in different parts of the world. For example, "shoulder ride" is more prevalent in the United States, while "back ride" is more commonly used in British English. No matter what term you use, giving someone a ride on your back is a fun and playful way to connect with others.