Literally going beyond getting Crunk. It's when the status of a party has reached nuclear levels and anything goes, up to and including dance/drug/alcohol induced combat dancing and roman orgies where such things probably shouldn't be going on.
Nerds, Party Animals, Rockstars, Gangstas, Prostitutes, random porn starlets, Politicians, Police officers... your mom. ALL OF THEM totally fucked up the next morning as each one awakes in a stupor, smell of liquor and marijuana lingering in the air mixed with stale sweat, musky scent of vajayjay and semen... no two people who'd normally even get along, and it's evident everyone partied and probably fucked like fiends.
THAT's *CRUNK NUCLEAR*