Filling Word Documents with Pretend Text

If you want to fill a page(s) with text to test something like printing, but don't want to spend time pasting the same phrase over and over,

Type in =rand(x,y)

Where x and y are replaced by numbers.
X would be the number of paragraphs
Y would be the number of sentences in a paragraph.
The text that gets generated is The quick brown fox jumps over the lazy dog.