If I’m paying attention, my word is “fudge!” although it may come out as “Fuuuuuuu—udge”.
Although lately, for some odd reason, I’ve been rather taken with “crivens!”
My best friend has had construction workers complain about her language, and when I’m tired I’m worse than her. I should hand out earplugs to parents of small children wherever I go.
Right now my default is fuck in various forms – fuckin’, f–in’ (no seriously, I leave a gap in the middle, sounds like I’m on TV and the audio’s been censored), fuckitty, and motherFUCK.
I have a few that I’ve somehow picked up from a character in a story I’m writing: “assjack” and “Jeebus toast!”
And occasionally I’ll use the overly-literal translation “Fils d’une chienne!”
I’m horrible. I have several things I say when stressed (which is all the time)
Fuck Me!
Fuck Me Hard!
God Fucking Dammit!
Sonofabitch Motherfucker!
Shitfuck!
For Fuck Sake!
Jesus Fucking Christ
Pigfuckers and Whores!
Goddamn asshole mother fuck shit shit shit sonofabitch that hurt! (fer the toestubbings)
(I like the word “fuck” apparently)
Fuck Me in the Ass with a pogo stick
MotherFUCKER!
Assfucker!
then the much milder; Oh Piss! or Fer Christ!
and when I’m trying (and usually failing) to be tame I say “shootdarn”
and when I’m being snarky because someone shoots a glare due to my rotten mouth I snidely say “Gracious Me!”
I forgot my more jovial
Holy shitnuggets, batman!
Holy flamingcunts batman!
and…
Fliegennde Kindersheisse (the spelling may be off)
You beat me to it, Miller. Shit on a stick!
I may be moving south so I’m polishing up the all purpose, elegant and undervalued “Well, shee-yut.”
“Bite me.” Straight to the point and kinda hostile. Yep, it suits me.
But as a default, it’s typically “Holy Crap” unless it’s something really bad. Then it’s “Holy Fuck”. Which I let fly in front of my tiny grey-haired mother. She gasped and waggled her finger in my face, “That! ‘That’ is never HOLY!”
My reply? “Then you haven’t been doing it right” 
I’m now refered to as the-daughter-who-swears-like-a-sailor.
When my nieces are around?
Oh ffffffffff…fff.fff.fercryinoutloud!
Depends on the setting and the impetus. This morning, I’m afraid, it’s been mostly “fuck.”
[Why yes, I was trying to get some Micropenis Software to go where I wanted it to go today. What gave you that idea?]
Frustration and disappointment: “Bollocks.”
Severe frustration: “SHIT!”
Frustration that I was kind of expecting, or commiseration with another’s ill fortune: “Aw, shit, fuck and damn.”
Surprise, e.g. at size of spider toddling across the carpet, or righteous anger at ill fortune that has befallen another: “Motherfucker!”
Extra surprise, visual: “Jesus fuck-my-eye Christ!”
I don’t really have a single default, per se, as it varies by the situation and the degree of emotion that brings on such words. Overall, these are the words I tend to use the most often for various situations:
Mild annoyance, anger, frustration, etc.: “Dammit.”
Moderate annoyance, anger, frustration, etc.: “Goddammit!” or “Shit!”
Severe annoyance, anger, frustration, etc.: “Fuck!”
Extremely pissed: “GOD MOTHERFUCKING JESUS DAMMIT HOLY SHIT CHRIST FUCK!!!”
Disbelief of disgust: “Christ!” or “Jesus Christ!” Add “fucking” in the middle for higher degrees of this emotion.
Mild surprise: “Shit.”
Moderate surprise or shock: “Shit!” Higher degrees include the words “holy” and then “holy fucking”.
Confusion: “What the Christ?!” or “What the fuck?!” Add “holy” for higher degrees.
“Balls!”
I am the only person I know that says this. No, I don’t know where I picked it up. Yes, it’s multi-purpose. 
Aw, hell.
That covers nearly all bases for me.
“GOD DAMN IT!”
I’m trying to train myself to say “Blast” or “Perkele,” though.
I ocassionnaly say “Balls!” as does one of my coworkers. I picked it up from my mother. When I was a child, in her effort to train herself not to swear too much, she would yell “Oh Balls!” and when she was really pissed it was “Jesus Balls!” That one still makes me chuckle. She stopped saying it, however, when, I, in all my 4 year old cuteness, screamed it in public once. Poor Mom.
Oh. I forgot a couple (I swear a lot, okay?)
Fuck me in the ass!
Fuck me in the goat ass! (don’t ask)
Anastasaeon, I have a story about “bloody hell:” I lived in England from '83-'85, and went to the British school near our house. Shortly after arriving I was hanging out in the hallway one day, and a big, tough-looking girl walked in, mad about something, and yelled “bloody 'ell!” (imagine it with a N. Yorkshire accent). It was the very first time I’d heard that, and it struck me as funny, so I unintentionally chuckled. In return I got the “look of death” from the other girl. :eek: I scampered away, having learned a valuable lesson: never laugh at a tough kid when she’s angry.
By the end of my first year there, of couse, “bloody hell” was quite familiar and had become part of my own vocabulary. These days I’ll still slip the occasional “bloody” in there, but infrequently.
My wife used one saying that cracks me up, without fail, every time. It is reserved solely for use when something has gone terribly wrong, and is going to continue to go wrong for a long time. It is said with virtually no inflection, in a very resigned voice.
“Well fuck me. Timmy’s stuck in the well.”
I have one I call the Carlin:
"shitpissfuckcuntcosksuckermotherfuckerandtits"
Oooo-Fahhh
Bull Shale
Hay-zeus Crimps
Snotchkis
hahahaha
You’re a great daddy, JohnBckWLD.