Found some tags that I figure should be aliased but I decided to check here first. The first one I don't think should be a problem (I'd add it myself but I seem to be unable to do that), however I'm curious about the last two.
(tag that I think should be aliased to...) -> (...this tag)
top_down_bottom_up -> top-down_bottom-up
There's two uses of the tag top_down_bottom_up so I figure it might crop up again.
big_breasts -> huge_breasts
big_boobs -> huge_breasts
This one I'm not so sure of. huge_breasts is the vastly more popular tag but is there a standard on Danbooru that "huge" is generally used as an adjective to describe large things, rather than "big"? Should there be? I'm thinking that choosing one over the other sets a standard that all the other related tags should follow. In other words, aliasing "big_breasts" to "huge_breasts" means that it should always be "huge_penis" or "huge_eyes" or whatever. Actually, just doing searches for "*huge*" and "*big*" it seems like huge might be the more popular adjective already...
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