Absolutely genuine or authentic; pure or untainted. A reference to the character Simon Pure in Susannah Centlivre's 1717 play A Bold Stroke for a Wife. The new leader is promising to bring simon-pure democratic principles back into the political discourse.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
Absolutely genuine, quite authentic, as in That laboratory test was simon pure; none of the specimens was adulterated. This expression comes from the name of a character in a play, Susannah Centilivre's A Bold Stroke for a Wife (1717), who is the victim of an impersonation but turns up in the end and proves that he is "the real Simon Pure."
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The real thing, the genuine article. This expression comes from the name of a character in an early eighteenth-century play, Susannah Centilivre’s A Bold Stroke for a Wife (1710). In it, Simon Pure, a Quaker, is the victim of an impersonation by Colonel Feignwell. However, the Quaker turns up in time and proves that he is “the real Simon Pure” (5:1).
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer