Not only does Washington, D.C., post Stand Right signs on its escalators, but it has also started an ad campaign in its metro cars to publicize the custom. (Hat tip: Ian)
Escalefter: person who stands on the left side of the escalator when he should be standing on the right
Here's what the DCist has to say about it:
Now we know what to scream at those people that refuse to stand to the right on Metro's escalators -- "Escalefter!" Yes, after much demand, Metro has coined a term to define those that engage in one of Metro's most hated activities. And not a minute too late -- tourist season is upon is, meaning one too many locals getting stuck behind blissfully unaware throngs of out-of-towners. If you're still a little rough on Metro's new words, we've got the skinny on them.