The New Commuter's Dictionary, First Edition (work in progress)

stairophobe, n.
An otherwise able-bodied person who insists on using elevators instead of stairs or esclators. See lazy.
crifter, n. from centre-drifter
Someone who drifts into the centre of a path while walking, such that they impede the flow of pedestrian traffic around them.
phone walking, v.
The act of walking while talking on a mobile phone, such that one completely ignores everything around them and walks slowly, as if intoxicated, into people or traffic, or any combination thereof.