Used to describe a location where operations rarely go according to plan.
The Simpsons - Springfield Nuclear Power Plant
Homer Simpson is head of Sector 7-G, the plant safety division.
The hotel in 'Faulty Towers' could be discribed as Sector 7-G
My house could be discribed as Sector 7-G, as cleaning operations never get done when they should.
The company i work for could be discribed as Sector 7-G etc."I work in Sector 7-G of *company name*"
An exclamation used when something's gone mildly wrong - based on the idea that Homer Simpson works in Sector 7-G at the Springfield Nuclear Power Plant and is always causing crises.
Colleague one: Sector 7-G!
Colleague two: What!? What!?
Colleague one: Dude, I totally just accidentally forwarded all that scathing correspondence to that arsehole in sales.