Falcon fail, first used by a YouTube user, is used when someone attempts to do an amazing acrobatic action (or falcon punch/kick) that's fails spectacularly.

However, when someone is seemingly about to fail but wins, it's falcon win.
Did you see that guy trying to do karate? he falcon failed!

or

I thought that guy was about to trip but he flipped, what a falcon win!
by dgfvdegtrhyjtukuk April 27, 2011
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