jettison

Short definition from Wiktionary

Noun

1. 1
   Items that have been or are about to be ejected from a boat or balloon.
2. 2
   The action of jettisoning items.

Verb

1. 1
   To eject from a boat, submarine, aircraft, spaceship or hot-air balloon, so as to lighten the load.
2. 2
   To let go or get rid of as being useless or defective.