The belief being certain big jaws had owners with a predisposition for murder.

I know the guy in the dumb looking hat and big jaw there.

The big jaws snapped down and bit into it, crushing the shell.

The skin along his big jaw may have tightened a little.

She stayed down, clearly unconscious, her big jaw looking broken.

They might include big jaws, long arms, dark skin or low brows.

The big jaws snapped fiercely, but got only an air sandwich.

The big jaw lay slack, the evil red eyes open and staring.

The girl whose flat this was had a strong plain face with bad skin and a big prognathous jaw.

Eyes too close together, big jaws, thin lips, ok body.