Top definition
An overpowering attractive force exerted by grandchildren on grandparents and other family members that results in all future family gatherings being held at their home. Especially strong for first grandchildren.
We'd love to have the whole family over to our new house for Thanksgiving, but of course we'll be at Dawn's again this year. Why else? Grandkid gravity."
by poetcetera November 27, 2012
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