What does FROLF stand for?

Frolf stands for FReeform gOLF.  Historically, the term Frolf came from FRisbee gOLF when Frisbee was the only Flying Disc available.  Like kleenex, frisbee has become known as the flying disc default term.

The Acronym FROLF according to the Free Dictionary.  According to the online slang dictionary, the definition is about Seinfeld.

Some people play a game called Disc Golf in tournaments for money.  Frolf is for fun.  You can play it with any flying object  you can propel.