1 definition by afrojim2009

Top Definition
When a trailer being hauled loses traction and begins sliding to the side of the vehicle that is hauling the trailer. Similar to a rear wheel drive vehicle fish tailing and losing control.
Passenger: Dude you better slow down on that turn, its pretty icy out there.

Truck Driver: You're right, I wouldn't want to jack knife and cause a wreck.
by afrojim2009 June 14, 2010

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