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The action you take when something online suprises you so much you find yourself hitting BOTH shift keys to type your response in caps.
When I found out the baby wasn't mine. I had was double shifting my facebook status updates.
by Nate Lavelle August 26, 2011
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The act of giving a hand job to a man while driving a vehicle with a manual transmission.
Suzy told her friends about doubleshifting Jack last night on the way to Thanksgiving Dinner.
by Andy O. February 28, 2006
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