I've seen this for a long while...I think I even asked about it on here before. It's when you see yourself ranking for a misspelling and you definitely don't have that onpage and you definitely don't have any links with the misspelled text. And, some sort of new domains will rank great for a number of slightly misspelled queries. Weird.

My memory is sometimes sketchy, but I don't think I've heard anything yet that makes sense.

I've read a theory elsewhere about sites lacking authority ranking well for misspellings. That doesn't make any sense to me. Of course, nothing about these things has to make sense.

I think it would be beneficial to understand this.