District in East London, coupled with Dagenham to form the London borough of Barking and Dagenham. It has a station on the District Line, but little else of real interest1. Since 'barking' is also a colloquialism for insanity (barking mad), people may sometime refer to someone being 'Upminster mad' - way beyond Barking.

1:If someone who knows more about Barking wants to correct this flagrant misrepresentation, they'll get C!'ed.