1 definition by Goombaguy

Top Definition
The grandmother that you and your cousins don't have in common.
"I've never met that person, she is Joe's Alternate Grandma; she and I are not related by blood."
by Goombaguy November 21, 2011

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×