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The person who is responsible for spontaneous occurrences of typos or other errors within text.
Guy: ring over the textbook when you come
Girl: ... what?!
Guy: agh, I meant "bring"! The Typo Ninja struck again!!!

Person: I waers going to the store
Person 2: Whoa, Typo Ninja got you there.
by Kelila December 01, 2009
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