a person who, for some inexplicable reason, stops at the bottom/top of an escaltor forming a human barricade.
I would have made the train if it wasn't for some escalump.
by Dwayne Keith Boyd July 10, 2008
A person who stands in the middle of an escalator, not knowing that they are blocking it for the people who like to walk.
Person 1: I seriously hate taking the metro because all the escalumps make going down the escalator such a pain in the ass.

Person 2: Seriously.
by Flywheel95 March 12, 2011

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