Golfimbul was an Orc-chieftain of Mount Gram, who led a band of his Orcs in an invasion of the Shire in Third Age 2747. He was met at the Northfarthing of the Shire, and defeated, at the Battle of Greenfields by Bandobras "Bullroarer" Took. During the battle, Bandobras charged at Golfimbul and knocked off his head with a club. Golfimbul's head flew through the air for 100 yards and went down a rabbit hole. It is said that this is how the game of golf was invented.
"fimbul" is Old Norse for "great".