A term used to describe driving in Auckland City New Zealand where the traffic is more congested than Hong Kong.

Thanks to a dumb arse profiteering government and the GFY council mafia parasites.
Sure, just car jam over to my house.

ok I'm already car jamming now...
by fu manchu magic July 28, 2017
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(noun) a vehicle which you are behind is being driven in such a manner that would make you think you are in a traffic jam but for which there is no other cars in front of it; a car being driven unnecessarily or deliberately slow to piss off people and create a traffic jam; a potential road rage victim; driving so slow as to delay everyone behind the vehicle but also ironically delaying the driver of said slow vehicle.

Not always but often on a city street where passing is neither possible or legal, and on highways or freeways during peak periods, occupying lanes in such a manner as to create congestion.
Steve: "Is traffic really bad on this street for some reason?"
Mike: "No, you're behind a one-car traffic jam."

Marco: "Is there an accident ahead? Why is this guy in the Honda driving so slow in the passing lane?"
Eric: "No accidents that I can see. That guy is a one-car traffic jam."
by ShoulderCheck2005 February 4, 2014
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Jam car (noun)

definition: A “jam car”is an essential addition to a mile long train, normally positioned directly behind the engine. It’s sole intention is to act as a “shock absorber” if the train were to come to an unexpected, sudden stoppage.
Jam car (noun)

definition: A “jam car”is an essential addition to a mile long train, normally positioned directly behind the engine. It’s sole intention is to act as a “shock absorber” if the train were to come to an unexpected, sudden stoppage.

Ex. “The jam car saved the whole shipment from de-railing when the Engineer had to slam on the brake to avoid a collision.

Slang - Jam car (verb)
definition: to bang sexually on a level which balances ferocity and love.

Ex. “I jam carred that broad all night long four months ago. She has demanded to pay my rent ever since.”
by Howard Alan S. May 28, 2022
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