Maybe it's because I'm on the spectrum, but in middle school I had so many inside jokes with myself. I was a quiet student but there was a lot of weird stuff going through my head.
Doodling characters as cats
Took Japanese in middle school. Kuruma no shita ni XYZ ga imasu. I ran with it.
I was obsessed with the guy from this video. Bubb Rubb
Yay for over-explaining the joke.