It's the longest grammatically correct sentence composed entirely of one repeating word.

That sentence isn't the longest valid English sentence, for example, this sentence is longer. In fact, as that Wikipedia article says, you can extend that sentence as well:

> Thomas Tymoczko has pointed out that there is nothing special about eight "buffalos"; any sentence consisting solely of the word "buffalo" repeated any number of times is grammatically correct.

Anyone who wants to go down that rabbit hole, see https://en.wikipedia.org/wiki/List_of_linguistic_example_sen...

I love that the article has a diagram with Buffalo from Rochester, NY too LOL