Top Definition
A Christmas card you only receive because you first sent a Christmas card to the sender and the sender has now been guilted into sending a card to you. Boomerang Christmas cards often arrive after Christmas has already passed.
You received a Christmas card from the Collins family - wow, that's impressive!" "No biggie, it's just a Boomerang Christmas Card because they received our card last week.
by IndySparkPlug January 04, 2011

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