I like to use the LoyceV AI capabilities to find the answer of this question.
I already asked the AI reagrding this, but it seems the origin of this word is still unknown even with the power of AI. The fact that even the AI doesn't know about this, then I assume that this is much harder to find than a lost dog several days ago

I saw the thread, I don't know

Never used the word, I know the "Flippening" from those Eth guys, but they're awefully quiet lately.