Hallgating

When someone who is in an obviously bigger hurry to be at the same location you are going rides up on your ass in a narrow hallway and invades your personal space from behind, making you feel totally uncomfortable to the point where you just hug the wall and let them pass.

Damn, John... back off and quit hallgating me, it's just a staff meeting, there will still be a donut for you when we get there.