yo-yo

I. noun (plural yo-yos) Etymology: probably from Ilocano yóyo, or a cognate word in a language of the Philippines Date: 1915 1. a thick grooved double disk with a string attached to its center axle that is made to fall and rise to the hand by unwinding and rewinding on the string 2. a condition or situation marked by regular fluctuations from one extreme to another 3. a stupid or foolish person II. adjective Date: 1932 shifting back and forth or up and down uncertainly or unexpectedly III. intransitive verb (yo-yoed; yo-yoing) Date: 1967 to move from one position to another repeatedly ; fluctuate <

the stock price yo-yoed

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