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A phrase used to describe people who either pretends they are n00bs/newb or look like one, but in actuality a secret pro that can easily kick your puny ass.

Refer to your rich, three-hot-wife'd former classmate that used to be a geek. Or the muttering guy on the corner of the street that turns out to be Chuck Norris.

This phrase is not limited to Asians.
"Dude, that guy on the beginner's contest is a bloody secret asian."

"No shit!"
by McDodos May 15, 2009