Student or Learner
I was wondering if you've ever heard such an exprassion for the US dollar?
"Federal Reserve Note" is the nomenclature.
I would have absolutely no idea what the person meant by that.
Often, the non-standard expressions people ask about, which are really single-use creations that are plays on words, are understandable.
The one is not.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
I would understand it (even given the lack of context) as an ironic or humorous expression between two speakers who understand it to be so.