As you all are no doubt aware, rounded upper teeth (examples: post #2114469 post #2122416 post #2091083) is an extremely common feature in many anime-styled works, and I find myself wishing I had a way to search for it it directly. However, before I go making a new tag for it, I wanted to know the community's opinion on whether a new tag is warranted, or if this should just be one of the uses for the teeth tag. The tag isn't implicated by more than bloody teeth, although it is a very broad tag that ends up finding its way onto pictures with a grin or clenched teeth anyway.
I'm leaning towards adding a new tag and having that tag implicate teeth, but then the question is, what do we call it?