the GNU version of the Collaborative International Dictionary of English
adj. Without conscience; indifferent to conscience; unscrupulous.
The Century Dictionary and Cyclopedia
Having no conscience; free from or not marked by conscientious scruples.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. lacking a conscience
Word Usage
"Maybe the last time you stood with me, you were scared and your sweat fell onto the forest floor, contaminating these leaves with your bad judgement, your conscienceless sweat."