A favor you do someone with good intentions but that in the end hurts the receiving party.

The word has originated from a fable by Jean de La Fontaine where a bear tries to helps his master in chasing a fly away from his face by throwing a boulder at his master, and killing him in the process.

Example: If you do someone's homework you do them a bear favor. You do them a favor, but in the end they haven't learned anything.
When today's parents spoil their children they do the children and society a bear favor.
by Ghost Tartar October 20, 2014
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