YO-YO

The yo-yo is a toy consisting of two equally sized and weighted discs of plastic, wood, or metal, connected with an axle, around which string is wound. First becoming popular in the 1920s, "yo-yoing" still enjoys a following of children as well as adults.
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Noun
1. a toy consisting of a spool that is reeled up and down on a string by motions of the hand
(hypernym) plaything, toy

n. yo yo

YO-YO. TONTO. IMBRANATO. BARBONE. FLUTTUANTE. OSCILLANTE. FLUTTUARE. OSCILLARE. GIOCARE CON LO YO-YO. MANIPOLARE

slang. โยกโย้, ลังเล (แบบงี่เง่า)