1) The act of being a Grinch(i.e. The Grinch Who Stole Christmas)

2) Someone who is too cheap to buy Christmas presents or doesn't believe in the joy of Christmas.
Marcus: Hey Tyrone, what did you get your ole lady for Christmas dis year?

Tyrone: Bitch didn't get nuthin!

Marcus: Ahh man, why you be Grinchen so hard?
by Jeff Ashley December 8, 2011
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