adjective Informal.
  1. of, relating to, or characteristic of the rock-'n'-roll music, fashions, entertainment, etc., of the 1960s, especially in France.
  2. of or relating to the people associated with these trends.
  3. having exuberance, optimism, and enthusiasm for current fads, as a teenager or young adult.

Origin of yé-yé

1960–65; < French < English yeah-yeah
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples of ye-ye