A child that results from a sperm donation and is treated as extended family on the part of the sperm donor. In particular, a spuncling is to a spuncle, what a niece or nephew is to an uncle (or aunt). The term is gender neutral.
by sage_jock April 3, 2010

There were four adults who took the kid to see the pediatrician -- two parents, a grandparent and the spuncle.
by family boy January 13, 2009

When a mom/daughter team marries two brothers...the wife's hubby is her spouse and uncle. Ergo, 'spuncle'
Take that, MB!
Take that, MB!
by ShoeGirl119 September 1, 2011

by Jairys November 18, 2020

a word that people use to describe their special needs uncle. basically if you but "sp" in front of anything it makes them special.
by duxksubs June 22, 2019
