The phrase references a document, typically in portable document format, that allegedly contains a list of unofficial or less commonly known menu items available at a specific restaurant chain. Such a file would aim to reveal combinations or customizations that are not publicly advertised but can be ordered by customers. For example, it might include details on a specific way to prepare hash browns or a particular ingredient combination not listed on the standard menu.
The perceived value of this type of resource lies in its potential to enhance the dining experience by unlocking a wider range of options. It can also provide a sense of exclusivity or insider knowledge, appealing to those seeking novel or personalized culinary experiences. The concept of undocumented menu options has a historical precedent in various dining establishments, often arising from employee creativity or customer requests that become informally recognized.