
Kitty on "That 70's Show" said porky-mouth all the time, and it's the funniest word. I also like octothorpe, which is just a big word for the # symbol. haha. Sphygmomanometer is fun too, and so is shenangians.
http://www.youtube.com/watch?v=UfC4u5GCy3I
I also like octothorpe, which is just a big word for the # symbol. haha.

i used to curse too much, particularly the term: a**hole. i now refer to those particular people as: "donkeys"
I try to curse in Brit-speak when possible. They have better words & Americans rarely know what you're talking about to get offended. 
Mine is more of a phrase that is used as an exclamation: "Christ on a pony". It is usually said following something not going right, kind of an "oh crap" replacement.