
A portee is a truck that carries a gun on its bed, such that the gun is not affixed permanently to the vehicle, can be quickly unloaded, and can be fired from the truck. While the term portee can be used to denote any truck carrying a gun on its bed, it is most often used to describe portees used by British/Commonwealth forces in the North African...
Found on
http://en.wikipedia.org/wiki/Portee

Portee was British Second World Wat slang for a lorry carrying an anti-tank gun or howitzer in the back.
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http://www.probertencyclopaedia.com/browse/ZP.HTM
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