I have something out to beta readers right now that several of them have already pointed out contains this section:
“I wasn’t this big when I was a child,” Arkadij said patiently. “I couldn’t wait until I got big to start making money. Besides, this was more fun.”
And then a few pages later, this section:
Arkadij looked embarrassed, his face reddening, though his smile didn’t drop. “I’ve been this size since I was still a kid, really. When you’re big, especially if you’re a big kid, everyone wants to fight you. I got tired of walking out with a nosebleed every time I walked into a public house.”
Not the worst, but the most recent thing I've been embarrassed about.
Historically, the most embarrassing things I've ever written have had to do with sex scenes, so I can't really post that on the forums. But I have a contrarian personality; I feel a knee-jerk urge to subvert common tropes, but some tropes and common scene beats exist for a reason. So I would write sex scenes but reject the idea of making them erotic, and in my inability to conform to the usual physical and emotional beats of such scenes, I would just write really gross, unromantic, strangely clinical stuff. I really cringe just thinking about it. Subverting expectations is not always a good thing, people!