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The art of arranging one's penis and testicles in underwear so as to create the illusion of enhanced girth and/or length.
Example 1: "I worked some hung shui magic and now it looks like I'm packin' serious sausage."

Example 2: "Did Jimmy stuff a potato in his pants?" "No, he just did some hung shui."
by SuperRobert December 16, 2010