The phase "The quick brown fox jumps over the lazy dog" is a pangram (a phrase that uses all of the letters of the alphabet). It's especially used when demonstrating a typeface because it is short and coherent. Unfortunately, I've always taken issue with this phrase; I've never met a dog (lazy or otherwise) that would allow a fox to jump over it. I like to think that it seems about as unrealistic as saying, "The quick brown dog jumps over the lazy dinosaur," but then it wouldn't be a pangram.
But who needs an "f" and "x" anyway?
Photo credit: Me (or some family member) - Porter Kansas Huber
Font Credit: Octin Vintage