Terminology: or "What the heck is she talking about?!"
Some of the terms on this site may be confusing so here is a quick lesson:
Sport: Refers to a color that is something other than a recognized show color. Most often it refers to an animal that has blue eyed white colors in the background which produces white on an otherwise solid colored rabbit such as a white snip on the nose or foot or even a white color similar to a Dutch marking.
It can also refer to a non-conforming fur type. Such as a Holland Lop that has long hair or a Lionhead with no mane or Beveren with Rex fur.
Non recognized colors for a specific breed can also be referred to as a sport such as an American Sable in a pointed white or sable point color or a Beveren in Chocolate color. These anomalies are the result of ancestral breed crossing which pops up most often in rare breeds. While not recognized for show some of these non-showable colors can be beneficial in breeding for a correct color.
Vienna Marked or simply VM: Another term for sport but it applies to the blue eyed white gene ONLY.
Vienna Carrier or VC: Means that the animal may not display the Vienna marking (white spots or blue eyes) but carries the gene to produce a blue eyed white.
Broken: No, the rabbit isn't broken but the color is broken by white. So a black and white or brown and white etc.
Harlequin: This can refer to the Harlequin breed or to another breed with the color pattern similar to a Harlequin.