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2.
An older American vehicle (yank), which are known for being very fuel-inefficient, really large (tank) and often very uniquely designed. Most yanktanks were produced before the 1973 fuel crisis, but some are still produced today (Lincoln Town Car and Ford Crown Victoria for instance).

Some however think that the size of the engine of an yanktank should be given in cubic inches, and if it isn't it's not a real yanktank.
Fred: Scotty drives a real yanktank.
Mike: What does he drive then?
Fred: He's got a '64 Impala.
Mike: Oh, yeah, that's an yanktank for sure.
by difiCa June 25, 2007
 
1.
A slang word most commonly used in Britain and Australia.

A large American car. Usually has a large V8, handles like an aircraft carrier and gets extremely bad fuel consumption.

Basically any car that has been produced out of America from the 60's on, but some before then.

Some are:
Older Dodges
Buicks
Cadillacs
Some Chevrolets
Newer Oldsmobiles (Especially 1977 Oldsmobile Cutlass)
Plymoths (Excluding Prowler)
Imperials
Etc
(While Driving a Cadillac or any other Yank Tank)
Uh-Oh, A corner. Might as well get out and walk.
by Defenestration expert September 29, 2009
 
3.
Another name for a pocket pussy, or any other autoerotic paraphernalia that collects semen post-climax.
My God, Tim. Don't you ever Lysol this fucking disgusting yank tank of your's? This thing must see more rainfall than the fucking Amazon river delta.
by Pussy Galorious August 15, 2011
 
4.
Noun.

British slang for a large and unweildy American car, usually an SUV. Examples include the Chevy Suburban/GMC Yukon and the Cadillac Escalade.
"Oi, did you see Tim's new Yank tank?"

"The Escalade? Yeah, it's shit."
by frank carter May 14, 2005
 
5.
Ugly clumsy American car
She bought a yank tank to take the children to school. It handles like a boat and looks like it was designed by a 7 year old.
by Austin Morris January 11, 2004
 
6.
British slang used to describe large, ugly, poorly-manufactured american cars. In europe american cars are seen as a kind of joke for people with small penises.
Yank tanks like caddilacs are heavy on fuel, ugly as fuck, and with the 0-60 of a three-legged donky named Daisy.
by Gumba Gumba March 01, 2004