This phrase is one of a kind. It has utmost emphasis and is a prime example of when someone does not care. The phrase is not to be used in a public environment unless you truly "Don't give a fuck". This slang sentence is used primarily when under criticism, because when you don't care what somebody else says, whip out an "I don't give a fuck!" and they'll shut their fucking mouths ;)
A style of acting or speaking that portrays lack of interest or caring. Doing the anything without fear of consequence or reprocussion. Really you can do anything "I dont give a fuck style". Hell, im writing this definition i dont give a fuck style cuz i dont care who reads it or who it offends or who it hurts.