There's a tag named style-gude. I'm fairly certain that's a typo of style-guide, which is also a tag that already exists. Interestingly, style-gude has a description while style-guide does not, although more questions are tagged with style-guide than style-gude.
If I'm correct and style-gude is a typo, then it should be burned, the description should be moved to style-guide, and any question with the tag style-gude should be retagged with style-guide.