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"Kidi" is describing how people usually talk on the internet with one another. Like using the words "lol", "lolz", "rofl", or any other excessive use of interweb lingo. Usually spoken from adolescent children and young adults that have made internet their social life.
Kid: "zOmg that was roflcopters."
Person: Please refrain from the kidi talk.
by Thomas Fletcher August 12, 2007