To stand on the left side of the escalator and not walk, as is proper Washington, DC Metro protocol; to not follow the "stand left, walk right" rule. A mistake commonly made by tourists or clueless (and occasionally rude) locals.
by kcr123 July 11, 2008
A person who stands on the left side of the escalator instead of the right. This prevents people from descending or ascending the escalator if they don't want to stand on their way up/down.
Oh man I hate it when there is an escalefter in front of me when I'm getting off the subway and running late for work.
by Zaindy August 18, 2006