Good Yankee-used-as-adjective quote found today. The Staunton (Va.) Vindicator, May 3, 1861:
We are able only to give our readers a half sheet this week. It will be seen however, that we furnish almost as much reading matter as usual, as we have thrown out all the Yankee advertisements except one or two that have paid in advance. We devote our space almost entirely to the publication of news relating to the present crisis.
It seems WeirdNET isn't quite sure if this word could mean "a native or inhabitant of the United States," so it has to say it three times. For an interesting argument, see the second WeirdNET definition on Virginians and imagine the conversation between a Virginian (native or inhabitant of the United States) and a Yankee (native or inhabitant of the United States). Whooooeeeee!! Sounds like FUN!