true-blue

This was a tough true-blue presbyterian, called Deans, who, though most obnoxious to the Laird on account of principles in church and state, contrived to maintain his ground upon the estate […]

1818 July 25, Jedediah Cleishbotham [pseudonym; Walter Scott], chapter VII, in Tales of My Landlord, Second Series, […] (The Heart of Mid-Lothian), volume I, Edinburgh: […] [James Ballantyne and Co.] for Archibald Constable and Company, →OCLC, page 190

And werenae the folk guid sound Whigs and true-blue Prebyterians I would hae seen them ayont Jordan and Jeroozlem or I would have set hand to it.

1892, Robert Louis Stevenson, “The Bass”, in Catriona, London; Edinburgh: Thomas Nelson & Sons, →OCLC, page 168

Ellen [DeGeneres]'s honesty and true-blue down-to-earthness were riveting.

2001 October 23, Ted Johnson, “Reader Forum: The Ellen Show”, in The Advocate, Los Angeles, Calif.: Liberation Publications, →ISSN, →OCLC, page 4, column 1

That [Stefan] Lorant was Hungarian might have made [Bill] Brandt even more wary, since he was in the process of being re-born as a true-blue Englishman and leaving the Hungarians of Montparnasse behind him.

2004, Paul Delany, “In Pursuit of the English”, in Bill Brandt: A Life, Stanford, Calif.: Stanford University Press, →ISBN, page 99

On the other hand, their swing/three-way practices have made Tony one of the most true-blue mates one could have, an absolute dream for women, in fact.

2007, Lainie Speiser, “Alternative Lifestyles”, in Threesomes: For Couples Who Want to Know More, Beverly, Mass.: Quiver, →ISBN, page 158, column 1