Another great use of the word is in the film "The Boondock Saints" by Troy Duffy: 

                                      ROCCO 
                          What did you do?! Fuckin'... what  
                          the fuckin' fuck! Who the fuck, fucked  
                          this fuckin'? fuck. How did you two  
                          fuckin', fucks?......... FUCK!!! 

                                      CONNOR 
                          Certainly illustrates the diversity  
                          of the word.