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a slang term for "nice", used interchangeably with "sweet" or "cool". Usually drawn out in speech and pronounced "n iiiiiii eeeeee"
Mike: "Dude those are some niii pics you got there from your backpacking trip."

Teacher: "No homework this weekend, class."
Student: "Niiiiiiiii!"
by Cruel Leader March 01, 2010
another shorthand way to desribe our daunting kwanza proprietors.
man did you see that niii cap that other niii...i laughed so hard i coughed up a biii...
by MACHEAL November 26, 2004