This feels like an acronym that takes longer to mentally decode than just writing the thing out.
I've never heard of this one (or at least not seen it commonly enough to actually be worth remembering), and at least for me formulating a comment takes much longer than the act of typing it, so I'm not sure what exactly is saved in cases like this.
Someone will post a question and immediately below it, clarify why they think that'll solve their problem. e.g:
> How do you assert that a jest mock was called?
> WAYRTTD: My test passes, but I'm not sure function X was called and I'm worried it's passing anyway.
Helps keep people on the right tracks more often than not.