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English definition of “yo-yo”

yo-yo

noun [C] uk   /ˈjəʊ.jəʊ/ us    /ˈjoʊ.joʊ/ (plural yo-yos) trademark
a toy consisting of a circular object that can be made to go up and down a long piece of string to which it is tied

yo-yo

adjective uk   /ˈjəʊ.jəʊ/ us    /ˈjoʊ.joʊ/
describes something that moves up and down quickly, or something that changes repeatedly between one level and another: yo-yo dieting
(Definition of yo-yo from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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