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When a person finishes a sentence that you have started. A title given to a person who has a history of completing sentences
Dave: I really like apples, but i hate how much.....
Eric: The cost has increased.
Dave: The cost has increased.

Dave: Hey man did you hear what Eric did yesterday?
Mark: Ya i heard he was being a sentence rider again.
Dave: What a bitch

by douche noozle March 20, 2009
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