Real Dictionary

jettison
verb: If you jettison something, for example an idea or a plan, you deliberately reject it or decide not to use it.
verb: To jettison something that is not needed or wanted means to throw it away or get rid of it.

jettison in American English
a throwing overboard of goods to lighten a ship, airplane, etc. in an emergency
to throw (goods) overboard
noun: the act of casting goods from a vessel or aircraft to lighten or stabilize it
transitive verb: to cast (goods) overboard in order to lighten a vessel or aircraft or to improve its stability in an emergency

jettison in British English
noun
verb: to throw away; abandon