"First Great Western" (FGW) is a slang term used in the UK to describe the worst levels of mediocrity and shameless arrogance.

Of a person: A person is "FGW" if they any or all of the following.
Rude, Surly, Arrogant, Lazy, Jobsworthy, Irritating, Unreliable or lacking in intellect.

Of a service: A service is "FGW" if it is all or most of the following:
Unreliable, Massively overpriced, Almost always late, cancelled, dirty or overcrowded.