I got a verbal warning for referring to someone as a "guy" in my team's group chat.
As in "I've got a guy here who's running into issues with getting his loan processed. How should I proceed with assisting him?"
My language wasn't professional enough, and my manager pulled me aside to warn me not to do it again. I've since left the role, and my new team fully embraces casual conversation (my manager has outright exclaimed that "our software is a piece of shit" to much agreement). Things are much better now.
I remember there was some juicy drama about that posted on another social media site. Apparently, there was a group of customers dining out, all of whom were women. I think most of them were lesbians or something to that effect so some of their attires weren't exactly feminine. So, when the waitress asked something like, "Is that everything for you guys?" they absolutely flipped. I don't remember how much trouble she got into for it, but oh boy, I'm forever scared that such an innocent slip of the tongue could land me in some thick shite at work.