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3.
Something that is astonishing, or unbeleivable. Could relate to a party, a young woman, or a car.
"Damn girl, you're all crunkin and shit"

"See Wally's lux ride? Those hydraulics are crunkin."
by Lil Jon September 10, 2003
 
1.
It means to be very cool, crazy, fuckin great, awesome or it can be substituted as "hell yeah".
"Man I went to a crunkin party last night...fun shit"
"Thats crunkin fo sho"
by Tigga July 02, 2003
 
2.
The act of any Emergency Services apparatus (especially Fire Department) cruising through flooded-out areas and checking for floating bodies.
Once we were through crunkin', we headed back to the station.
by Woobey March 20, 2007