Meaning

noun a member of the political party that urged social reform in 18th and 19th century England; was the opposition party to the Tories

noun a supporter of the American Revolution

noun a member of the Whig Party that existed in the United States before the American Civil War

originFrom Whiggamore, possibly from Scots whiggamore (“horse driver”), from whig (“to drive”) + mare.

Etymology from Wiktionary, CC BY-SA 3.0