Ah-ha...

From my little bro, who is concerned that I am uncool, the definition of Crunk:

"The creation of beats and hooks so powerful that the audience is instinctively moved to sway, dance, and lose themselves in the moment, gave birth to crunk music. Crunk identifies music so powerful a word hadn't been produced for such a reaction until the imprint of crunk on the American consciousness."

Yah. Um-hmm. A word did not exist to describe it. So they came up with crunk.

And now, for a history lesson:
Lil Jon & the East Side Boyz often claim to be the Kings of Crunk, while Lil Scrappy is referred to as the Prince of Crunk. Shaina is sometimes known as the Queen of Crunk, and Ciara (or Sierra as I would spell it) is often referred to as the Princess of Crunk. While these artists have embodied the term in the hip hop industry, the term was more widely exposed when Lil Jon named his albums Kings of Krunk and Crunk Juice. Serious, the Founder of Crunk Incorporated is known as the Lord of Crunk. Serious Lord discovered both Lil Scrappy and Crime Mob.

Serious Lord. Like Bob Marley, but a different kind of Lord and Saviour.

To "get crunk" means to have an extremely good time, usually at a party.
While the word "crunk" is presumed to be a blend of the words "crazy drunk," being crunk does not necessarily include being intoxicated, but there is a good chance that if one is crunk, he or she is, indeed, intoxicated as well. Crunk artist Will to the E describes getting crunk as "bein' up in the club, maybe havin' a few girls up on you, and feelin' in the zone."

Yep. That's pretty much me here in Africa. Crunked. K-to-the-P