It exactly sounds to me the words Japanese small children use resisting to some suggestion their parents give, acting like a baby.
Originally, it is Iyada(dislike) but colloquially it souds like yada.
A child has a special choice to get at a shop but his or her mother recommends something else for some reasons with which they try to persuade hard. The child says,” yada, yada, yada, I prefer to my choice”.
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