Недавно наткнулась на такую:
Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo.
после консультации с Википидией:
The sentence's meaning becomes clearer when it's understood that it uses the city of Buffalo, New York, and the somewhat-uncommon verb "to buffalo" (meaning "to bully or intimidate"), and when the punctuation and grammar is expanded so that the sentence reads as follows: "Buffalo buffalo that Buffalo buffalo buffalo, buffalo Buffalo buffalo." The meaning becomes even clearer when synonyms are used: "Buffalo bison that other Buffalo bison bully, themselves bully Buffalo bison."