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1 definition by kafaboy

 
1.
When something is really weird and terrifying and traumatizing in a way you can't forget. Extra points if it involves freaking out younger family members. Based on the crazy youtube video.
That murder scene in the movie was really I Am Your Grandma.

Q: Man! Why did you just run naked through that elementary school?
A: I Am Your Grandma.
by kafaboy May 15, 2011