In most areas of the U.S., westbumfuck means a rural area away from the city, see the sticks or B.F.E. A town that is in the middle of no where that is no where near any urban city. A city that is more than an hour commute for its capital. A boondock area of the state in which usually nothing, not even shit, happens.
Also a nickname for Westborough
1) Angela lives all the way out in Westbumfuck, it is so far from here.
2) Damn you live all the way out in Westbumfuck.