“Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo” is a grammatically correct sentence in the English language, used as an example of how homonyms and homophones can be used to create complicated linguistic constructs. It has been discussed in literature, in various forms, since 1967 when it appeared in Dmitri Borgmann’s Beyond Language: Adventures in Word and Thought.
The sentence uses three distinct meanings of the word buffalo: the city of Buffalo, New York; the somewhat uncommon verb to buffalo, meaning “to bully or intimidate”; and the animal itself, buffalo. Paraphrased, the sentence can be parsed to mean, “Bison from Buffalo, which bison from Buffalo bully, themselves bully bison from Buffalo.”