Wiktionary
lobby group
n. An advocacy group.
Usage examples of "lobby group".
The biggest cluster was for Natural Wisdom: a quasi-green lobby group set up for the sole purpose of opposing the use of neural hardware.
Fergesson was a member of the American Civil Liberties Union and the NAACP and the Help for the Handicapped League--the latter being, as far as Stuart could tell, nothing but a lobby group on an international scale, set up to promote soft berths for all the victims of modern medicine and science, such as the multitude from the Bluthgeld Catastrophe of 1972.
There was no forwarding contact, but Dan advised me to try the American Association of Retired Persons, which turned out to be a muscular lobby group.