Top Definition
A possible scenario of a relative whom is an aunt and a sister at the same time; when a woman has a child with a father and another with his son, or when a man produces children with a mother and a daughter, the aunster being the result of Subject A and the older generation (child with the mother or father) as related to the other child.
Ty: "How is Joelle your aunster?"

Jordan: "We have the same mother, but my Grandpa is her Dad."

Ty: "Dude, what the fuck!!??"
by ilovewhopperjrs December 21, 2009

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.

×