look up any word, like sweetest day:
 
2.
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
 
1.
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