For every day use: Motherfucker!
For special occasions: Goddam motherfucking cocksucking dicklicking jugfucking babyraping banjo-eyed sonofabitch!
Why thank you. 
After all, I did get people calling Crunchy Frog the “assclown of evil” for a while. Have to love a word used by both Chris Jericho and the movie Office Space.
From jarbaby, I learned “Fuckwaffle”.
From blur, “cumaquarium”.
And another vote for “fuck”.
Well, I like ‘fucknut’, ‘knobrot’, ‘oily cunt rag’, anything with ‘cocking’ in it (ie. ‘un-cocking-believable’), ‘holy fuck’ is also quite good and you can’t go wrong with a good old combo-cuss, for example ‘fuckbitchwhorecuntslagbuggerbuggerfuckitfuckfuckFUCK!’.
Fuck is kinda universal if overused, Shit is also one of my personal favorites.
When I want to get a little bit more personal the shitheapface and the stupid little bitch in training (sometimes pseudo elitist wannabe, hasn’t even grown out her first set of pubes yet stupid little bitch in training, I admit thats a better one to write then to say).
OK,OK…All this cussin’ is fine and dandy. My favorite has to be the moniker FuckBubble, as well as a dismissive DiddleFuck.
But what of getting yelled at for cursing when not doing so? Example: one on the shithead moderators over at AOL chat, admonished me for my language, for using the word PUSSY when refering to my cat! Can ya believe that shit Gus?How can ya NOT love the word Pussy?It’s so fun and friendly.
Say it with me…“Pussy” again …“Pussy” Once more…“Pussy” I See that smile on your face!
Tarter Sauce!
Mono de Culo (Ass Monkey) works well with the babyjesus in the truck.
“Fucktard” or “moronic fuckhead” is a favorite of mine when addressing it at/about someone; good old “fuck” is nice for general swearing.
Muth-a-fuck-ah applies to all people at any given time.
Shit applies to all situations.
Of course, when you really don’t like someone you can fuck them and the horse they rode in on. Sometimes you have to include their dog too.
Ass.
Fuck.
Bollocks.
It occurs to me that I swear entirely too much. Hehehehehe.
My favorite word is Bastard, be it beady eyed rat bastard or the normal variety it is just fun to say. Cumtrap is one that gets tossed out to my friends on occasion same as dick-a-holic. For a nice string of the profain I often go with cocksucking goatfucking cumguzzling assblasting dick-a-holic.
Dickweed.
Eat penguin shit, you ass-spelunker.
You know, it’s not big and it’s not clever.
Bigjobs.
Cock-a-hula-fucking HOOPS.
Arseweasels.
Shitbastards (with a short “a” in “bastard”)
Let’s see:
Assclown
Twatwhistle (also Jarbaby’s, I believe - thanks)
Asshole (typically "Nice ___, asshole!)
Rat Bastard (good assonance)
Cunt (usually paired with “fucking”)
Fuck (typically paired with “stupid” for name-calling, but an all-around good swear)
And my own: yarg! Damnable yarging cobblepot!
I’ve become quite fond of “jackass.” It’s not wholly offensive, and it’s really unmatched as a descriptive term for a certain kind of person. I can use it in coversation at work and not get a sideways glance.
Alas, MTV has nearly ruined this fine epithet for me.
I’m partial to “Goddamn” - This is the ONE curse word that makes my SO shudder. She finds it pretty offensive so I have, more or less, eliminated it from my vocabulary so that I don’t slip and let loose a big “GD” (as she calls it) in her presence.
Tibs.
Gosh, there are just so many good ones…
Rat bastard
Assclown
Fuckweasel
Dickfuck (said by a friend many years ago; still makes me laugh)
Christ on a cracker
Shitfucker (eww)
Assbiscuit
And of course, the one and only “fuckchop”–thanks, jarbabyj!
My personal favorite! I’ve always loved motherfucker, but I’m committing that litany to memory. I must also thank jarbaby for “titsweat.”