cold heart

An unloving, unemotional, or uncompassionate disposition. You'd have to have quite a cold heart not to feel sympathy for the poor woman. This cold heart of mine isn't really moved by films like that anymore. I can't be in a relationship with someone who has such a cold heart.

cold heart, a

A dispassionate, unaffectionate individual. This term already meant lack of love in Shakespeare’s time. In his Antony and Cleopatra (3:13) Antony asks the queen if she now prefers Caesar to him, saying, “Cold-hearted toward me?” and she, denying it, replies, “Ah! dear, if I be so, from my cold heart let heaven engender hail, and poison it in the source; and the first drop in my neck.”