What is cab beef?

As an AI language model, I cannot find any reliable information on "cab beef" as it does not appear to be a commonly used term in the food industry. However, it is possible that "cab beef" is referring to beef that comes from a specific breed of cattle, such as the Black Angus or Hereford. These breeds are often associated with high-quality beef due to their marbling, tenderness, and flavor. It is also possible that "cab beef" is short for "cabin beef", which may refer to beef that is typically consumed in remote cabins or hunting lodges.