Vogue sniffs:
You won’t find them on the designer floor at Barneys or Bergdorf’s. Neither Marc nor Karl, Phoebe nor Miuccia showed them on their 2013 runways. And yet, walk down any high street in America (and probably the world) and you will see a battalion of young women with knees free to the world in front, while calves—and sometimes even ankles—are swathed in fabric in back. These bipolar dresses and skirts, usually but not exclusively rendered in translucent chiffon, have been called “high-low” by some parties; others have saddled the poor things with the moniker “mullet,” which is not exactly a compliment.
Walk down any high street in America.... When did "high street" replace "main street"? I had to
look it up:
High Street (or the High Street) is a metonym for the generic name (and frequently the official name) of the primary business street of towns or cities, especially in the United Kingdom.... The equivalent in the United States, Canada and Ireland is Main Street, a term also used in smaller towns and villages in Scotland and parts of rural Australia...
And that was the U.S. website for Vogue, not the British. So there you have it. Don't wear that high-low skirt, and use Britishisms.