What is all in French?

that's what she said -> literally, c'est ce qu'elle a dit (say suh kell ah dee)

But, As a real franch dude, I'll say that the catchiest way to say it is "c'est ce qu'elles disent toutes !" (litteraly : "that's what they(feminin) all say")

That is kind of the way you could actually hear it in France.

bye