The phrase "more bleeding-heart" is often used to describe those who are excessively or overly compassionate. However, there are a number of antonyms that can be used to describe someone who is lacking in empathy or sensitivity. These include words like callous, unfeeling, unsympathetic, and heartless. Other words that could be used to describe someone who lacks compassion might include selfish, ruthless, cruel, or uncaring. Depending on the context in which these words are used, they could be used to describe everything from a person's overall demeanor to their specific behaviors or actions towards others.