Besides the usual usages of a child born out of wedlock and a suitable name for someone you don’t like, there are other meanings as well. At one time it was used to refer to a hybrid device or one adapted from one purpose to another; in 1517 it was used to refer to second rate Spanish Sack wines and in engineering it refers to a type of coarse-toothed file.
by AKACroatalin September 19, 2016

A term used to describe someone who disregards other people in pursuit of their own self-interest. Usually includes the acts or act of lying, spreading mis-information, covering one's own ass at the expense of others, or employing other forms of bullshitting.
"The day I broke up with my girlfriend, my roomate told her she would have been better off with him instead of me. He's such a bastard.
by Truthtellerunc April 18, 2010

by x0racunx March 22, 2010

by niggakooch August 18, 2009

by Jai Alai March 15, 2008

Besides all the usual meanings, it has a meaning in engineering as well. A bastard is a type of coarse-toothed file.
Conversation in the stores.
"Hi, I need a file."
"A half-round bastard?"
"No, a little triangular fucker."
"Hi, I need a file."
"A half-round bastard?"
"No, a little triangular fucker."
by Croatalin December 20, 2013
