doubleshifting 

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.

doubleshifting by Andy O. July 21, 2008

Double Shifting 

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.

Double Shifting by Nate Lavelle August 29, 2011