"Shucks, Roy!" - Gabby Hayes (pick a movie)

"Yo Rinty!" - Corporal Rusty in "Rin Tin Tin" (TV series)

"Whoa, Nellybelle!" - Pat Brady (Roy's TV sidekick long after Gabby died) speaking to his jeep.

"Kiowa!" (or insert the "fierce" tribe of your choice) - said by everyone when examining an arrow they just ripped out of a corpse or from the wooden side of the wagon, stagecoach or whatever.

"Pahoo!" - Usually shouted by Yancy Derringer just before X Brands produces a weapon from out of nowhere and nails Yancy's would-be assailant.

"It means, 'Faithful Friend'." - Tonto