Who Dat?

There have been many fine articles written about what last night's game meant to post-Katrina New Orleans (and my eyes welled up with almost every one that I read), so I won't give my own account here. The Saints were 2-0 heading into last night's game against the division-rival Atlanta Falcons. Their 2 victories came against less than stellar teams (the Browns and the Packers), so no one really thought they could beat the Falcons (who looked excellent in their two victories). Maybe it was just the emotion of the night, but the Saints played like they were possessed, winning 23-3.
I've had a chant from my childhood running through my head since the game:
Who dat? Who dat? Who dat say dey gonna beat dem Saints?