The next few will probably be dialogue only stories, because those are fun to do. One hundred words and one cross-fandom joke, coming up!
"Hey Arthur, I was just thinking—"
"Here we go."
"—Everyone with magic can be called a magician, and it's nice and convenient and easy to say."
"Your point, Merlin?"
"…Why isn't there a nice, convenient word for people who don't use magic? Like…Non-Magics? Or Muggles?"
"Muggles?"
"It's an idea…"
"Sure, a stupid one. Sounds like someone's pet lapdog."
"…No muggles then?"
"No muggles. How about normals?"
"Arthur, that's insulting both ways. Lackspells?"
"Naw. Nulls?"
"Oh, and muggles was stupid?"
"Er…"
"…The mundane. Mundies for short."
"...Mundies. It's okay."
"That's settled then, prat."
"Idiot."
"Clotpole."
"Cabbage head."
"Mundy!"
"Merlin…"