grandnibling-in-law 

1. The grandchild-in-law of one's sibling.
2. The grandchild of one's spouse's sibling.

My grandnibling-in-law is a good person.

grandnibling-in-law by Elivaldeq November 24, 2019

grandgrandma 

the mother of the mother of your mother

him: so my great grandmother was native american
me: your who? i beg, it’s grandgrandma🥴

grandgrandma by Mél April 2, 2020

grandmillenial

An interior decorating style inspired by high society decorators of the 1940s to 1950s. Design features include chintz, floral wallpaper, velvet upholstery, fringe, and large flower arrangements. The style is similar to granny chic, but is more high end and luxurious.

If you’re trying to create a grandmillenial vibe, you should buy that fringed velvet ottoman.

grandmillenial by Seahorse Valentine May 25, 2020

Grandilex 

Grandilex is a very good looking gentleman that is good at everything and has a 10 inch dick

Someone: Dam look its Grandilex
Someone else: Holy shit doesn't he have like a 10 inch dick

Grandilex by I love Grandilex March 26, 2021

grandnibling 

Sibling's grandchild.

I have 78 grandniblings (39 grandnieces and 39 grandnephews).

grandnibling by Gerald128 April 6, 2021

Grandcicle

The amount of money acquired from delinquent bonuses that goes directly to a Disney fund.

Great job at work! That will be a dope grandcicle for Disney!

Grandcicle by Chelsh April 8, 2021

Grangerland intermediate school

It is a school full of stupid teachers

Yea I go to grangerland intermediate school

Grangerland intermediate school by GGK Vision April 21, 2021