The phrase "a callous man" is correct and usable in written English.
It can be used to describe someone who is emotionally insensitive or unfeeling towards others.
Example: "Despite the suffering around him, he remained a callous man, indifferent to the pain of those in need."
Alternatives: "a heartless man" or "an unfeeling man."
He was a callous man who was careless of human lives, but, above all, he was in love with war and Mr McLynn is not always reliable on military detail (far from issuing rifled carbines to "snipers, sharpshooters, skirmishers, voltigeurs and NCOs", Napoleon distrusted rifled longarms and forbade their use).
Cox had been instrumental in getting the death penalty verdict, and features by 60 Minutes and the New Yorker had depicted him as a callous man dismissive of racism, working in an office where a colleague had a Ku Klux Klan leader's portrait hanging on a wall.
"The real Field Marshal Haig was certainly not a callous man," says Gary Sheffield, author of The Chief: Douglas Haig and the British Army.
In the episode, Field Marshal Haig is shown casually sweeping away toy soldiers with a dustpan and brush; BBC News Magazines Finlo Rohrer called this a "visual allusion to his callousness", but quoted the historian Gary Sheffield as saying "The real Field Marshal Haig was certainly not a callous man.
"You know you're going to grow into a selfish, callous man.
When I was a younger, more callow and callous man, I was convinced of three things.
Many older people will watch the movie, which was No. 1 at the box office last weekend, and see a cautionary tale about a callous young man who betrays friends, partners and principles as he hacks his way to lucre and fame.
Murphy went for a quick swim and returned to say, "It's like the Butthole Surfers song — 'Strangers Die Every Day.' That sounds callous, man, but I really only know the music.
Mr. Romney's friends, colleagues and old classmates — women and men, Republicans and even some Democrats — have remarked throughout the campaign that they do not recognize the aloof, seemingly callous man that has been depicted by the Obama campaign.
Once we have cleaned up and closed, my colleague Esther and I marvel at the people in the world, the manipulative, callous men and the foolish women who find them attractive.
A "callous" and "selfish" man has been jailed for life after drowning his nine-year-old grandson in the bath.
