For use in times when a red liquid or stain is present and it's origin isn't explicitly stated, shown or implied.
I wanted to run this idea past everyone so I'm not stepping on any toes by making it without discussing it first.
Posted under Tags
Sure, a lot of seiran_(touhou) posts could use this tag since her mallet has an unknown red stain on it. Especially posts like post #2060412, post #2090889 and post #2012484 where the artist isn't definitely showing it to be blood or jam.
So far people have either been assuming it to be blood or not tagging it at all.