Actually, it depends, and the final form of my username on most social media platforms has a very long story.
It all began when I found this meme funny.
And my username became pippipthediddlydo.
But that honestly became quite a handful, so it got shortened to PipPipTDD. Then shortened even more to PipPip, as people honestly just called me Pip most of the time anyways.
During this period my friends and I had developed a tradition where on Halloween, just for the day, we would put "spooky" in front of our username. I don't remember how my username evolved in this timeframe, but at some point I decided (because I'm very funny /s) to take it a step further and in a very ironic fashion, add a "not" in front of that spooky, to then remove the "not" on Halloween. So the entire year I'm "not spooky" until the one day that I am. And a few adjustments here and there got me to my current username on most platforms (because pip gets taken literally everywhere): notspookypip.