We need a killing instinct.

He was always working on something, he said, the killing instinct was inborn from the time of Cain.

Ring and Banjo were snarling their hope of murder as they came up to aim, counting upon their killing instinct to mow down opposition.

His killing instincts had once again overtaken him, pushing everything else from his mind.

The experiments increased the chiropterans' killing instinct and removed their former regard for humanity.

He was accurate and consistent, but failed to show the killing instincts.

And I should warn you, Commander, I've never had much of a killing instinct.

She'd sensed the killing instinct in the guard's attack, and her newly-honed skills and instincts had saved her.

I want to know conclusively that he still has the killing instinct.

When the killing instinct wavered among the Germans, they started to surrender.