Brockenbores
From Tolkien Gateway
Brockenbores, or Brockenborings, was a network of tunnels in the northern part of the Shire's Eastfarthing, in the hilly region of Scary. This was one of the more outlying parts of the Shire, which was perhaps the reason that a band of Hobbit rebels hid here for a time when 'Sharkey' took control of the Shire during the War of the Ring.
Etymology
The name of this place is given as 'Brockenbores' in the text of The Lord of the Rings, but as "Brockenborings" on the map that accompanies the trilogy. Both versions of the name have the same meaning, and translate approximately as "badger-burrowings".[1]