One user has created the tag procrastination: see this question. In principle I would have immediately deleted it as totally irrelevant (in the same way I would delete "Stupid question" or "Useless question" from the title of any post), but the user included in his post:
"Remark: I wanted to add the not yet existing tag procrastination to my question. I think this would be a good additional tag for many Mathoverflow question inspired for example by a reproachful pile of copies waiting to be corrected."
So I hope we can discuss it here.
I don't quite like the use of a subjective metatag, whose relevance can only be judged by the poster themself (nobody would add this tag to a question of another one: this could sound offensive), and which is absolutely useless as a tag (and by the way not so nice to potential answerers).
And if the purpose of tags is also to reflect OP's state of mind, why not other such similar smiley-like metatags really-cool-question, bad-question, i-love-mathoverflow, please-hurry-up? Well, I'm joking, but if one creates one such first tag to reflect OP's state of mind or convey jokes, there could be additional ones as well.