Definition of "grinch"

Here's what they would risk: appearing responsible for higher taxes next year after Obama offered them a deal to extend the Bush-era rates, coming off as grinches for failing to extend unemployment insurance during the holiday season, and the possibility that next year Obama and Democrats will actually hold more leverage in this debate.

2010 December 9, Chris Good, “Will Republicans Scuttle the Tax Cut Deal?”, in The Atlantic‎