LOL Fluffing...
...I think we had a talk earlier and words like 'freaking' are borderline, so I'd stick to the classics like 'Bloody' (You bloody bastard!) or even 'Fracking' of internet fame.
OR....
...you could get bonus points and come up with an ORIGINAL insult fitting your character (King Diamond- You..you filthy PEASENT!...) Sansiro (You miserable HEATHEN!)