Definition of Essex man in US English:

Essex man

noun

British
derogatory
  • A term used to denote a supposed new type of Conservative voter, to be found especially in London and the south-east of England in the late 1980s, typically (especially contemptuously) characterized as a brash, self-made young businessman who benefited from the entrepreneurial wealth created by Thatcherite policies: compare "Selsdon man".

Origin

1990s; earliest use found in The Sunday Telegraph.