This became one of the most frequently looked up words on our site following Sarah Palin's embrace of it – first during her candidacy and later in the title of her book, Going Rogue.

Rogue, meaning "one who can't be controlled," comes from rogue elephant – one that "roams alone."

Example:

"She's lost confidence in most of the people on [her] plane," said a senior Republican.... He said Palin had begun to "go rogue" in some of her public pronouncements and decisions.

— Time.com, October 2008