I curse like a mill worker, so it's usually something like "***** tapdancing ******, but sometimes I'll use a PG one, like "mother Fletcher" or "sweet mercy!"
lol Ive used 'Sugar Honey Iced Tea' its from the movie 'Madagasca'
I usually use 'Frac' which is THE swear word from the Battlestar Gallactica tv series lol
But of course the first thing outa my mouth is usually not a word but something that sounds very similar to
Going back to my catholic roots - Jesus, Mary and Joseph! If the situation calls for it - Son of a biscuit eater! (don't ask, I don't know where that one comes from). Sometimes I'll say I swany!
OMG! Camalot Farms & Luvin Life - I didn't know anyone else said that!
I say close to what you do: "Lord love an Irish duck". (ARE there Irish ducks??) I got it from my mom, who's maiden name was Finnegan, so I'm sure her family tweaked it