Top Definition
emotionally hardened; cold-blooded and indurate to public opinion;
I have become so callous towards your constant critizizam
by Eloise. December 07, 2008
Not giving a rat's ass about anything.
The extreme of all apathy.
Not giving a fuck.
Lack of all things binding one's emotions to any actions they commit.
That man is so callous. He has a family of a wife and six kids but he still drove his car off of a cliff and into a pile of burning tires because his friend said, "Do it, you won't."
by Clinik December 23, 2009
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