Английский Этимологический словарь - jet (v.)

- M.E., "to boast, brag, strut, swagger," from M.Fr. jeter "to throw, thrust," from L.L. jectare, abstracted from dejectare, projectare, etc., in place of L. jactare "toss about," freq. of jacere "to throw, cast." Meaning "to sprout or spurt forth" is from 1692. The noun meaning "airplane driven by jet propulsion" first recorded 1944 (from jet engine, 1943). The first one to be in service was the Ger. Messerschmitt Me 262. The idea for jet propulsion (and the phrase) was around since 1867. Jet set first attested 1951, slightly before jet commuter plane flights began.