hump
v.— « Some railroad workers don’t appreciate the general public wandering around in their yards. There’s a good reason for this. Quite a few idiots get killed every year when they wander behind or under a train while the cars are being humped (hooked together by the engine, usually done at speeds of up to 15 mph).» —“Benching 101″ by Seetwist Faster Than the World May 29, 2007. (source: Double-Tongued Dictionary)
Further reading
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