How about this one? “James while John had had had had had had had had had had had a better effect on the teacher.”
Needs quotation marks
Yeah, I always hated that one because it only works because of the (incorrect) omission of punctuation. The Buffalo buffalo one doesn’t need anything except the period at the end to be correct.
Bison*
Consider the following:
Buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo.
Didn’t know buffalo was a verb.
Don’t let them buffalo them into believing that tripe.
It means to bully basically. The sentence can be rewritten as “Buffalonian bison that other Buffalonian bison bully also bully Buffalonian bison.”
“Buffalo buffalo buffalo Buffalo buffalo Buffalo buffalo buffalo” is a tautology but still a sentence
It gets worse:
Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo
Rochester bison that Rochester bison bully bully Rochester bison
Capitalization is key for this one
Buffalo: to puzzle or baffle; confuse; mystify
