ginger group a highly active faction within a party or movement that presses for stronger action on a particular issue. informal

☞ An old horse dealer's trick (recorded from the late 18th century) to make a broken-down animal look lively was to insert ginger into its anus. From this developed the metaphorical phrase ginger up, meaning 'make someone or something more lively'; in the early 20th century the term ginger group arose, to refer to a highly active faction in a party or movement that presses for stronger action about something.

1970New Society The appearance of ginger groups to fight specific proposals, is not necessarily a bad thing-particularly if the established bodies aren't prepared to fight.