Can someone translate this authentic frontier gibberish.... Reverend!

It appears (from listening to the clip) that imdb is more correct.

I wash born here, an I wash raished here, and dad gum it, I am gonna die here, an no sidewindin' bushwackin', hornswagglin' cracker croaker is gonna rouin me bishen cutter

dad gum it = god damn it
sidewinding = The action of avoiding a promise that has been made beforehand by shifting the conversation topic to something else. To squirm out of a deal.
bushwhacking = to lie in wait", "to ambush", "to assault".
hornswoggling = get the better of (someone) by cheating or deception.
cracker croaker = not entirely sure, but "croaker" can be defined as a person who grumbles or habitually predicts evil.
rouin = ruin
bishen cutter = not even a clue here. Some people have quoted this part very differently, most commonly as "biscuit-cutter"

Cracker cooker is the correct sentence. Its a derogatory term for squatters who ran out to homestead before the posted duration of the law during the gold rush.

It's "...hornswagglin' crackercroaker is gonna run away ..."

Remember, this is Gabby scolding the preacher, who's just said he's going abandon the rest of the group. You could summarize Gabby's speech thus: "Get back here! Nobody's going to run away, (you) [biscuit cutter?]!"

Gabby's response to the preacher's "I'm leaving" begins: "you get back here you pious, pain in the ass side winder! Ain't no way that nobody is gonna leave this town!"