I find a good formula to use is *offensive word* *gerund* *seemingly innocuous word in other contexts*

Examples:

You cock chugging sycophant! 

You can always add some adjectives to spice it up as well as turning the seemingly innocuous word into a horrible one.

I hope you burn in hell you you moronic, half-brained, ass licking twatlump! 

Of course, the angrier I get the more colorful I can be...usually I twist people's words back on them, I reckon I'm more improvisational during an argument.  My language isn't for those below the age of 17, as you can see.

I would give you a taste of my more refined and sarcastic wit, but I like to save that for special occasions...and I'm not really feeling it right now.

~Zoo

Heh, heh...now that's an insult.

~Zoo

Jack Ass

ass/hat/clown

Fuckstick

fucking eejit

slack-jawed-knuckle-dragger

ree-tard

prick

I may have a potty mouth, but there's one word I reserve for very special occasions - which always seem to happen when I'm driving and some dumb bitch cuts me off or otherwise drives like the aforementioned fucking eejit: C-U-N-T.

I have to be REALLY pissed off before that comes out of my mouth.