The nickname came about initially from a typo. Someone was talking about “Elmo” and others asked what the fuck they were talking about, and then they clarified that it was a mistake. Then there were Elmo/Elon jokes. So now it’s a board inside joke.
It’s not because people looked far and wide for the most scathing insult possible and came up with it. It was a funny accident that tickled people here.
It started here: