Origin: orig. military slang, after a creature (Eugene the Jeep) with extraordinary powers, in comic strip by E. C. Segar (1894-1938): later assoc. with G.P., abbrev. for General Purpose Car
See jeep in American Heritage Dictionary 4
Origin: Probably pronunciation of the letters GP, designation for this vehicle in the manufacturer's parts numbering system
Origin: : G(overnment)
Origin: + P, designator for 80-inch wheelbase reconnaissance car.
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