>>2076055Actually, if you read the descriptions of the bottomless tags, instead of just looking at the images submitted with those tags (for mistagging is a thing you know), you'd see that the descriptions on the boorus and the guidelines in that bottomless thread are pretty much the same. Here's gelbooru's description:
>Pictures in which a subject is wearing no clothing from the waist down. The subject does not have to be barefoot for this to apply; this refers more to a lack of pants, skirts, undergarments etc. If the subject is both topless and "bottomless", use nude tag instead. Also, this does NOT apply to pictures where the lower half a person (or people) are cut out of the picture.Danbooru's goes into even more detail.
https://gelbooru.com/index.php?page=wiki&s=view&id=843http://danbooru.donmai.us/wiki_pages/4131 