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emotionally hardened; cold-blooded and indurate to public opinion;
I have become so callous towards your constant critizizam
by Eloise. December 07, 2008
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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2
Uncaring, indifferent or unconcerned about the feelings or needs of others, heartless, cruel.
The wealthy industrialist rolled his eyes in callous disdain as he brushed past a crying child begging for help.

The school bully callously humiliated a helpless newcomer.
by Lorelili November 18, 2012
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3
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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