Keeping in mind the three senses of the word—the city in western New York , the animal we also call bison, and the verb that means to intimidate or bully—the following is a complete and grammatically valid sentence:

Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo.

Here’s how you make sense of it:

Buffalo (the city) buffalo (bison) (that) Buffalo (the city) buffalo (bison) buffalo (intimidate) buffalo (intimidate) Buffalo (the city) buffalo (bison).

In other words, “Bison from Buffalo that other bison from Buffalo intimidate manage nonetheless to intimidate still other bison from Buffalo .”

Cool, eh? There a Wikipedia link, if you can stand it. Just enter "buffalo buffalo buffalo."