Definition of "hollow-hearted" [hol•low-heart•ed]

• Insincere; deceitful; treacherous (adjective)

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• "Should an investigation (a transparent one, mind you) reveal the hollow-hearted evil that too many assume true to just pooh-pooh, the retribution would not just be directed at a relatively well-protected him, but at the less-protected average U.S. citizen daring to move about the world."
• "For all his supposed affability, he was reveling in being a mean-spirited, hollow-hearted jerk."
• "And as in meat and fruit there is this inward and hidden deceit, so likewise the same is to be found in the people that are born and bred there, who make fair outward shews, but are inwardly false and hollow-hearted."