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1

: selfish regard for or devotion to the welfare of oneself; malicious acts motivated purely by spite

2

: behavior by an animal that is not beneficial to or may be harmful to others but that benefits itself
"Wow, Randy is a dick! An elderly couple asked him where the DMV was and he told that it had shut down a year ago, and that they had to go back across town."
"Yeah, he is a firm believer in maltruism."
by jacksiback June 26, 2017
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2
Giving to charity to spite someone
Whenever I see protests in front of Planned Parenthood, I give to Planned Parenthood out of maltruism.
by Stefonfan September 04, 2017
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