There is a wonderful subreddit called Dear Reddit, Today I Fucked Up… in which people post (usually fairly lighthearted) accounts of how they erred during the current day, beginning with the abbreviation “TIFU”. Here is my post there from today.
TIFU by starting to ask someone the question ‘So, where are you from?’, realising as I opened my mouth that it often sounds a little bit racist (with its implication of ‘So, where are you from *really*?’), deciding to draw attention to the fact that I know that it’s a stupid and clichéd question by putting it in air quotes, then didn’t really start moving my fingers until the last word of the question, which made it look like I was saying ‘So, where are you “from”?’ which made the question even worse.