An abbreviation of the name of famous author Brandon Sanderson. Usually used by lazy book nerds to communicate. People who use the word Branderson unironically usually are the same people who say "RAFO" in their day-to-day life.
"what happens at the end of the latest Branderson book?"
"RAFO lol"
"Why are you like this David thats why i deleted you on all my socials"