Noun
grandkid (plural grandkids)
(informal) A grandchild.
They love spending time with all six of their grandkids, and they carry the photos to prove it.
She’s in a different place, also, losing her grandkid. Source: Internet
With his grandkid on the way, we’re already thinking about some sort of family-comedy team up between Arnold and Chris Pratt that definitely needs to happen. Source: Internet