1 definition by aTresser

Top Definition
Performing an altruistic activity for personal gain.

Charity for personal gain.

Performing a selfless action for selfish reasons.

Resulting from a play on words, substituting "half" for "all" in altruism.
Tracy volunteers at the shelter because her father pays her, which makes her altruism "halftruism".
by aTresser April 15, 2010

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