It's used when someone, usually a female, severely violates fashion code. It's like trying to cram 20 pounds of potatoes into a five pound bag. This phrase is used for when the fashion police should be able to arrest someone for idiotic fashion judgment, like heavy women wearing spandex or booty shorts. I mean...what are they THINKING!!!???
Whoa, check out that fat chick wearing leggings! Now there's a Vogue-Don't!