This is a part of a podcast called "Norm Macdonald live" The phrase occurs 01:49 into the video:
420 was the birthday of Austrian-born German politician and the leader of the national-socialist German worker's party. A fellow went by the name Adolf Hitler.But this guy.. there's a picture of him... Adolf Hitler..very compelling kind of a figure.. odd looking duck.. there's something about his eyes..hypnotic.His eyes are almost entirely black. He was a decorated veteran of WWI and he joined the...hold the fort..he hated Jews!
He uses the expression as if it means "wait a second" but it means:
"hold (down) the fort"
To maintain the proper functioning or order of some situation or place, typically during someone's absence. (Farlex Dictionary of Idioms)