Noun
(Internet slang, derogatory) An inhabitant of the Western world; a westerner.
(Internet slang, politics, derogatory) A supporter of the Western world, especially the United Kingdom, Canada, and the United States.
(Internet slang, politics, derogatory) A supporter of beliefs associated with the Western world, such as neoliberalism, LGBT rights or NATO's military interventionism.
Source: en.wiktionary.org