Used to describe the utter fucking absence of knowledge concerning one's whereabouts in both a literal and figurative sense.
Also used to describe a location that is remote and far away from the more pleasant features of human civilization such as entertainment venues, good restaurants, electricity, high speed Internet and plumbing.
Plausible pronunciation: mob-fu-new; mob-finew; mob-fenu, etc
A:Shit, where the hell are we?
B: Dunno, mobfnw as far as I'm concerned.
C: Where did you say you were going to school again?
D: This place in Georgia that's in the mobfnw, fuck.