What does (insert random delay reason here) mean?
The reasons provided for airport delays use many shorthand terms and are somewhat free-form, so there is no rigid consistency to them. FAAwait will translate some of the common terms into more straightforward text. However, sometimes reasons will contain a combination of terms or airport-specific information (like the closure of a particular runway). They are also subject to typographical errors on entry, which makes the automated interpretation imperfect. If the application cannot “translate” the reason, it will show it as provided by the FAA. This FAA site can help you understand many of the key terms used, but generally they fall into categories of weather (usually with a “WX:” prefix) or traffic management (“TM:”).