1. adj. Derived from the words 'crazy drunk'; describes a level of intoxication. Specifically, being drunk to the point where one begins to act 'crazy'. Especially refers to drinking in a party atmosphere.
Example: "I'mma get CRUNK up in here tonight boi!!
2. style of hip hop dancing where the dancer appears to be crazy drunk.
(see also 'getting stupid', 'get retarded')