sidewalk bully
The person who walks directly beside their companion(s) on a crowded, narrow sidewalk and are unconcerned that there is foot traffic approaching from the opposite direction. These bullies always take the inside track and try to act oblivious as they run the oncomer off the sidewalk completely. It is as if the sidewalk bully is making a nonverbal boast that they have a friend, and you, the oncomer, are friendless and therefore inferior. In reality, sidewalk bullies, like bullies in general, tend to have low self-esteem and few friends.
Boss: "Joe, why are your shoes so muddy?"
Joe, "Sorry boss, I was accosted by a sidewalk bully on the way in this morning."
Joe, "Sorry boss, I was accosted by a sidewalk bully on the way in this morning."