a boy called me transgender today

Not exactly, but his exact words were, "I'm pretty sure Meowie is a girl on the inside, but a boy on the outside."

Except, instead of Meowie he said my actual name obviously

I rarely get offended when people insult me, and then was one of the times I didn't

So, I said, "I'm pretty sure you're a girl on the inside AND on the outside, so I really don't care."

Btw, no offense don't get offended this is a joke.