Top Definition
The act of counting the monetary value of Christmas gifts when compared to a brother/sister/spouse, just to make sure you get equal or greater value. Apparently if the calculator doesnt add up, you can complain, whine, bitch and moan until fair value is returned in future gifts.
WOW, Nana's Christmas Calculator was working overtime last night! We better go get her another Gift Card cause she got shorted and ripped off by $11.28.
by sarjas December 25, 2011

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