Back up.

In PC gaming the D button is often the button used to make your character go backwards.
Guy 1: Dude I'm in trouble here!
Guy 2: D Smash man!

or

Guy 1: And that's how I did something super complicated.
Guy 2: Woh D Smash, What did you do?
by CGeist August 16, 2011
Get the D Smash mug.