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the ability to make gratifying and often beneficial decisions based on one's impulses or wants without an overbearing sense of self-control;

that which enables people to do what feels good or what they like to do.
Although another glass of wine may not have been the wisest decision, the woman's wantpower enabled her to thoroughly enjoy the extra glass of vino free from guilt or shame.
by tronlaw July 23, 2011
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