Golfimbul was a chieftain of the Orcs of Mount Gram, who led his band in an invasion of the Shire. He was defeated at the Battle of Greenfields by a force led by Bandobras "Bullroarer" Took; the battle was only the first of two which were ever fought within the borders of the Shire (the second was the Battle of Bywater, the last battle of the War of the Ring, where his descendant Pippin fought). Bullroarer knocked off Golfimbul's head with a club and it soared into the air, finally falling into a rabbit hole. According to Hobbit folklore, this inspired the game of golf, which takes its name from the Orc. Golfimbul's name was probably specifically constructed for this pun; fimbul is Old Norse for "great".
The Orc incursion in the northern Shire occurred during the reign of Arassuil as Chieftain of the Dúnedain, and the Orcs led by Golfimbul were but the most western pack of Orcs which had left the Hithaeglir. 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 Orcs, preventing them from settling all of Eriador.
Read more about this topic: List Of Middle-earth Orcs