step-great-grandchild 

1. The child of one's stepgrandchild.
2. The stepchild of one's grandchild.

My step-great-grandchild is a good person.

step-great-grandchild by Elivaldeq November 24, 2019

step-great-great-grandchild 

1- Step-great-grandchild's child.
2- Great-grandchild's stepchild.

My step-great-great-grandchild is a good person.

step-great-great-grandchild by User655 July 25, 2021

step-great-grandchild 

1- Stepgrandchild's child.
2- Grandchild's stepchild.

My step-great-grandchild is a good person.

step-great-grandchild by QWP998756 October 15, 2021

step-great-grandchild 

1- Stepgrandchild's child.
2- Grandchild's stepchild.

step-great-grandchild.

step-great-grandchild by Simaduria July 27, 2024

step-great-grandchild-in-law

Step-great-grandchild's spouse.

step-great-grandchild-in-law.

step-great-grandchild-in-law by Simaduria July 27, 2024

Grandchildren envy

Envy of your unborn descendants who will live in the future and have access to awesome future technology.

Person 1: Someday they'll invent chips you can have in your head that can access the internet.
Person 2: Oh man I want one.
Person 1: It won't be for a hundred years though.
Person 2: Aww, man! So those lousy future people will get to do it but not me? Lame!
Person 1: You have a case of grandchildren envy!

Grandchildren envy by Nebula99 June 9, 2010

grandchildren 

Slang referring to the male genitals

I have misplaced my pants, my grandchildren are freezing

grandchildren by BigHornSheep January 17, 2004