Online Google Dictionary

yo-yo wordnet sense
/ˈyō ˌyō/,
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yo-yos, plural;
  1. Move up and down; fluctuate
    • - popularity polls yo-yo up and down with the flow of events
  2. Manipulate or maneuver (someone or something)
    • - I don't want the job if it means he gets to yo-yo me around
  1. A toy consisting of a pair of joined discs with a deep groove between them in which string is attached and wound, which can be spun alternately downward and upward by its weight and momentum as the string unwinds and rewinds

  2. A thing that repeatedly falls and rises again
    • - the yo-yo syndrome of repeatedly losing weight and gaining it again
  3. A stupid, insane, or unpredictable person