iron-jawed

I'm the old original iron-jawed, brass-mounted, copper-bellied corpse-maker from the wilds of Arkansaw!

Big Medicine was transformed into a cold-eyed, iron-jawed fighting machine.

"Muddy gasoline," nodded Millbank tersely—an iron-jawed, over-groomed man of forty, with a florid face shaved blue.

An iron-jawed fellow he is, with every muscle in his well-knit body to match.