What is yo yo means?

A yo-yo is a toy consisting of an axle connected to two disks, and a string looped around the axle. The yo-yo is held at the end of the string and manipulated with a series of motions that cause it to spin, unwind, and return to the hand. Yo-yos have existed for centuries, with various forms being found in ancient Greek and Egyptian civilizations. The modern yo-yo was invented in the 1920s and has since become a popular toy and even a competitive sport. There are many tricks and techniques that can be performed with a yo-yo, ranging from simple up-and-down motions to complex string tricks. Yo-yos come in a wide variety of shapes, sizes, and materials, each with its own unique characteristics and abilities.