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1.
A phrase that derives from hackers in online gaming. It is used when someone accomplishes the seemingly impossible. Usually it's meant to be a compliment to the "hacker."

The phrase can be applied to all aspects of life, not just video games.
A: Did that guy really just catch a squrriel with his bare hands?
B: yeah man, hacks on.
by Shiny Zebra June 21, 2011