A Pole Jump is when you jump off of a telephone pole on the same frame you land onto it. The result is doing a 'normal' jump instead of flipping backwards.
This trick works similarly to Ladder Jump, and you can do a Pole Jump from a ladder as well. When your character lands on a pole, they take a few frames to reorient themselves vertically on the pole. If you jump before they go fully vertical, you won't flip off.