What does it mean when someone says you have no heart?

When someone says you have "no heart," it is usually a figurative expression indicating a lack of sympathy, empathy, or compassion for others. It is often used in contexts where someone is perceived as being cold, indifferent, or insensitive to the feelings or needs of others. The phrase suggests that the person lacks a sense of human emotion and warmth, making them seem heartless and unfeeling.