Weirdly, it annoys me more when regular people say it in real life, because I associate the phrase so much with River Song, it sounds cringy when other people use it.
That’s the point. She knows what’s gonna happen and is treating her life like a “fiction work”. Surprisingly there are stories within the DW universe, so it also stands to reason that term exists. Hate to say it but she is also using it in the correct context too...
Yes. I hate River in general. A character that knows the future should not let on that they know the future because it changes the future and messes with my head.
We can't use "spoilers" River's way in real life because we don't have time travel, but, if we did, you don't think this use wouldn't be entirely appropriate?