It's a defensive line audible. In NCAA it's a defensive key that makes the line pin their ears back and jump the snap, really getting after the QB. Theoretically, I thought it was the same in Madden, but it looks like the old "crash out" under a different name where the ends sprint outward, taking themselves out of the play, but forming a very nice pocket for the QB to step up in.
I can't make heads of tails of it. Has anyone else had a different experience with "pass"?