I once saw the word nickel autocorrected incorrectly into something far worse. It was funny given the context (metals, not coins) but I wondered why someone would even have that word in their autocorrect dictionary.

What's in the autocorrect dictionary usually has nothing to do with what you typically write. No reason to wonder (i.e. if the insinuation being that that's a word they'd typically use).

My worst autocorrect story is a message to my mother in law referring to my sister in law. I told my mother in law that I’d give my wife’s sister “a*al’ when I got there. It was supposed to be ”a call” I’m still traumatized decades later.