A mustache that is deliberately grown and left unkempt until that person takes and finishes the Financial Accounting and Reporting (FAR) portion of the Uniform Certified Public Accountant (CPA) Examination. After finishing the FAR portion, the person proudly shaves it off. Similar to the No Shave November concept.
Ed: Looks like you're growing a beard, Andrew.
Andrew: Oh, this?
Andrew: I'm gonna keep growing this FAR-stache until I take FAR on the CPA exam.