Golfimbul was a goblin chieftain from the Misty Mountains. In TA 2747, Golfimbul led an army of Goblin soldiers from Mount Gram in the Misty Mountains into the Northfarthing of the Shire. The Goblin incursion in the northern Shire occurred during the reign of Arassuil as Chieftain of the Dúnedain, and the goblins led by Golfimbul were but the most western pack of goblins which had left the Hithaeglir (the Misty Mountains). The only reason Golfimbul could make it all the way to the Shire was that the Rangers at the time were fighting many battles with goblins, preventing them from settling all of Eriador.
The Goblin-host was defeated by a troop of Hobbits led by Bullroarer Took. During the Battle of Greenfields, Bullroarer charged at Golfimbul and knocked off his head with a club. Golfimbul's head flew through the air and went down a rabbit hole. It is said that this is how the game of golf was invented, in Hobbit lore.
- The Hobbit: An Unexpected Party pg. 24
- The Lord of the Rings: Appendix A, "The Realms in Exile" The Northern Line Heirs of Isildur pg. 1038
- The Atlas of Middle-earth pgs. 62-3