A prank derived in Chicago in the mid to late 2000's by an improviser. To "Denver" someone, as it is called, is to change the Facebook status of someone after they have left their account open to "I'm Moving to Denver".
Steve: "No, Mom. I'm Not actually moving to Denver. I went to the bathroom at work and a co-worker "Denvered" me.
by ryprov August 16, 2011