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A Giko is a person, that is very young, very immature, and ALWAYS annoying. They make stupid mistakes and try to catch other people in theirs. They may also troll a lot and misspell words without knowing. Stay away from a Giko, you will regret ever meeting it.
"Omg, Indianaboy123 is such a Giko!" --Person 1
"Oh, I know man, ban his Giko butt." --Person 2
by Purepower December 12, 2010
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