My dad had a quirky friend, "two dollar Bob" was his nickname. Great guy and fun to hang out with. Anyway, he got his nickname from going to the bank every week and getting $500 of two dollar bills every week, this was his pocket money for the week. He would sit down and write FSU on each bill every week, I guess it was his mark, something to be left behind, who knows, but he did it for years. It used to embarrass the living crap out of my dad when he offered to pick up the check, he would race to intercept the check before it got to the table instead of sitting and watching Bob count out a couple hundred in two's.
Anyway, if anyone here comes across a two dollar bill with FSU written in sharpie, that's my Dad's friend, "two dollar Bob".