Something I wish to do to my brother.
My brother is such an asshole I want to defenestrate him.
the act of yeeting something or someone out of a window
"I want to defenestrate myself out of a window"
The magic art of throwing something or someone out of a window.
ME: I can't Defenestrate him!
The King: Ok I'll Defenestrate YOU.
When your brain throws itself out a window.
I suffered a sudden case of mental defenestration.