A Canadian stand-off is a situation where in which two or more individuals are are tryin to pass each other in a hallway or intersection, and when confronted with the question of who will move first or have the right of way all of the individuals refuse to move saying things such as "no you first." Or "by all means." In this situation every one is too polite for any action to take place.
Tom: you first
Jack: no no by all means you sir
Jack: boy that sure was a Canadian stand-off.