Some I have heard...
Oh sugar
Oh fudge
Tarnation
Fiddlestix
God love ya
God bless it
Gosh all mighty
Shoot fire
Dang it
Durn it
Holy moly
Dab nab it
Goll darn
Cheese & crackers, got all muddy
Can you tell I've been around for awhile?
I actually only say something once in a great while, then it is... Oh, poop