when I was in grade school in the 60’s, and I wanted to express celebration in a sarcastic manner, I would point my index finger up and circle it around and say “I’m waving a flag”. Later, I noticed people used this motion in conjunction with “WhoopDeDoo” - so I don’t know if they were simultaneous, or if I actually started something.
In the early 80’s, while at my first Mensa conference, it was very late at night, or rather very early in the morning, and I said as I left the group to go back to my room to sleep “I’m turning into a pumpkin”. Now, I hear people say that (at the very late/very early hour) all the time. I ***know * ** I started that one.