When a group of people walk side-to-side down a hallway, forming a wall that takes up the entire width of the hallway. Walking walls tend to move extremely slowly, causing everyone stuck behind them to move at a snail's pace. Since walking walls tend to take up the width of a hallway, passing one would be impossible.
I'm running late to class, and this walking wall is blocking me.
by JoeySomething November 03, 2008
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