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A dick that, like the Grinch's heart, is two sizes too small, specifically in girth. It can also be used to describe an extremely unusual dick.
"He's pretty hot, but he has a total grinch-dick."
"Ooh, that sucks."
via giphy
by bowtheif November 21, 2016
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Person 1 : Damn dude, look at that big piece of bud.

Person 2 : Hell yeah man that looks like a grinch dick
by Logan "Mr Overtime" October 01, 2016
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