1. The grandson of one's stepsibling.
2. The stepgrandson of one's sibling.
My step-great-nephew is a good person.
by Elivaldeq November 24, 2019
on may 31st you will do anything to make your nephew feel appreciated. show him love.
omg guys, today is national nephew day. let me go give him a hug and tell him how much i love him.
by lani knows best May 31, 2022