pressure group
noun [ C ] uk/ˈpreʃ.ə ˌɡruːp/ us/ˈpreʃ.ɚ ˌɡruːp/
（谋求对舆论或政府施加影响的）压力集团
a group of people who work together to try to influence what other people or the government think about a particular subject, in order to achieve the things they want
Synonym: lobby