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1 definition by JDW1987

 
1.
Adjective, origins: unclear but definitely Australian slang

Defines a certain type of person. A wild, fun loving, careless nutter with little regards to rules or social convention.

Used in a jovial, friendly way.
After watching Gary drink a bottle of vokda, pass out and then pick up at a party, Jimmy realised his best mate was a madcunt.
by JDW1987 October 20, 2008