Mine is OOO for Out Of Office. I always misread it in my head like a ghost and it takes me a few seconds to process. It also doesn’t translate to speech—you have to say the whole thing.
Interested to see if others have similar acronyms they beef with.
Like all of them, I never remember what they mean and there are some people at work who love to use em. It just makes meetings take longer and emails become less legible.