Ancient Sanskrit word from the Hindu scriptures called the Gita, a holy word that was adopted by the Hebrews and used in later centuries, in Latin, and by then given a secular, nonspiritual definition. The word means, "And so forth " or, "Etcetera." When uttered repeatedly, as in, Yada, yada, yada," in Sanskrit, it means, "wherever, whenever, whereas."
She and her chatty friends kept droning on, talking about this thing that happened to her, then her other friend talking about that thing going on with her boyfriend and her friends right now, "...mygawd can you believe it?", And they went on nonstop, yada, yada, yada, until had to make up a bullshit but polite excuse to get away from these nice motormouths of which I no longer I had the time to be around.