crunk

In 1995, Conan O'Brien and Andy Richter were scheming ways to get past the TV censors on Conan's late night talk show, and they settled on an all-purpose, suitable replacement for the infamous seven dirty swearwords that they couldn't say on TV: Crunk. The choice to use that word was definitely not random. Ice T just happened to be on the show that night, and he likely fed the word to them beforehand and certainly helped fuel its popularity during the telecast ("That was seriously crunked up, right there."). But Ice never claimed to have come up with the word--he probably got it from Dirty South rappers, who had been using it for years as a euphemism for getting really crazy and fucked up on marijuana and alcohol (stoned and drunk. Chronic plus Drunk = Crunk). Or maybe crack and drunk. Or coke and drunk. Or maybe just being crazy and drunk. Whatever it is, it means getting really crazy and fucked up. And with Conan's introduction of the word to northern suburban audiences, Crunk came into its own as the recognized sound of the new generation of Dirty South Rap, prompting white college fratboys everywhere to wander around going "WHHHUT!! OKAAY!! YEEEAAHHH!!" like annoying dipshits. and it's all thanks to Lil Jon, and by Lil Jon I mean Dave Chappelle.

its a mixture of the word crazy and drunk

The term originated in the early to mid 1990s in Memphis Tennessee.
Many will tell you it is a combination of crazy and drunk, combining to form "crunk". That is false.
It is more or less a derivative of crank that was bastardized by youth.
The best way to relate it is to compare it to a wind up toy. You crank it repeatedly, if you crank it too much you passed the point of "crank" and have moved on to "crunk". It is a level that was not intended by design and the potential energy contained now is off the charts. When unleashed there is an unstoppable wave that is almost beyond comprehension or measurement.
If you are "crunk" you are basically a juggernaut of energy and nothing will stop you and you won't care what happens until such point that you decide to stop.

Originally coined by Dr. Suess in 1972, in his book "Marvin K. Mooney will you please go now!".

Highly intoxicated; Crazy drunk. Made popular by hip-hop artist Lil Jon.

high and drunk at the same time

A cliched and overused hiphop term that has been beat to death more than "Bling-Bling" and "Shizzle". It means to get crazy and drunk. The term lost it's "cool" factor like two years ago, but that doesn't stop wiggers and wanna be gangstas from using the the term as much as possible.