A local sports radio morning show has a semi regular segment with the same name. There are some obvious behaviors that come to mind and then there are some less common things that people do that make you scratch your head and wonder if they were ever taught courtesy or manners. This isn't necessarily indicative that people ARE asses, just that they might be if they display the behaviors.
So what examples do you have? Here are the first three that came to mind for me.
Office - if you try entering the elevator before allowing people inside of it to exit first
Office - if you enter an elevator, see someone coming, and hurry to push the "close door" button so that they have to wait longer...even worse when there are a limited number of elevators
Grocery store - if you leave your cart in the middle of the aisle so that people going either way have a hard time going around you, the whole time yapping away on your phone so loud that people two aisles over can hear you
So what examples do you have? Here are the first three that came to mind for me.
Office - if you try entering the elevator before allowing people inside of it to exit first
Office - if you enter an elevator, see someone coming, and hurry to push the "close door" button so that they have to wait longer...even worse when there are a limited number of elevators
Grocery store - if you leave your cart in the middle of the aisle so that people going either way have a hard time going around you, the whole time yapping away on your phone so loud that people two aisles over can hear you