A rather colourful nautical term that means to throw something overboard from a plane or ship.
The emergency with the seriously ill patient meant an emergency landing was called for. To do so, the plane circled over the sea jettisoning its excess fuel.
But we use it a lot to discard plans or belongings we know longer need.
Betty and Benny jettisoned the idea of a transatlantic wedding when the costs of plane fares and accommodation became prohibitive.
Mark jettisoned his old lounge suite and chairs and replaced them with a futon and a low coffee table.
I like jettison as it brings a little colour to the language and especially to a word which may have negative connotations.