A control freak. A rather nasty, manipulative, self appointed queen for all events relating to anything in her limited, but tightly-reigned little world.
The Queen of Hearts saw Alice and screamed 'Off with her head!', poor, poor Alice. ...and the Lao Officials smiled sweetly...saying...good queen, thank you, Queen Ann, Queen of Hearts...we own you now...but then we always have, haven't we Dear?
The worst kind of friend, the Queen of Hearts refers to any woman who tries to upstage the bride at a wedding by wearing something unbelievably eye-catching - typically "that sexy red dress" or something similar. The Queen of Hearts is a total cunt, and if anyone pulled a similar move at her wedding it would likely trigger the apocalypse. The best way to deal with the Queen of Hearts is to inform her - in the center of the dance floor with everyone watching - that the bachelor party is in the next room over. Failing that, you can always resort to hitting her with an Assembly-safe Shuriken.
"We went to Dan and Molly's wedding Saturday, and her friend Mora pulled a total Queen of Hearts - she showed up in a red dress with more frills than a Congressman's health insurance."