Why did I think of mustard? That's not remotely relevant.

My brain went to leotard so I can see it

Brains, they're full of weird shit, and we *try* to tamp it down. (Mine started with "cops.")

I didn’t let my teen students use language that was pejorative/discriminatory like that in class but I got extra angry for some reason at that suffix. I made myself be quiet and clear whilst I explained why it was bad and that I expected to *never* hear it cross their lips again.