noun

1. a throwing overboard of goods to lighten a ship, airplane, etc. in an emergency
2. jetsam

Etymology: ME jetteson < Anglo-Fr getteson < OFr getaison, a throwing, jetsam < L jactatio, a throwing < jactare, to throw: see jet

transitive verb

1. to throw (goods) overboard
2. to discard (something) as useless or a burden