mirror-stepping 

Noun: The process of almost walking into a person, then trying to get around them, only to have both parties end up moving in the same direction, blocking one another. Often occurs multiple times during an exchange.

Person 1: Hey what took you so long to get to class?
Person 2: I ended up mirror-stepping James. I went right first, but he went the same direction. It happened a few times. Finally I just stood still and let him walk by.
Person 1: I hate it when that happens.

mirror-stepping by NFTYite1205(Kopetrope) March 15, 2010

Mirrorstepping 

When you almost bump into someone, but move out of the way, but then they move the same way too, so you both move the other way, etc.

‘Dude, quit mirrorstepping everyone.’

Mirrorstepping by LouisBot9000Playz March 15, 2018