In Star Trek, refers to a procedure in which a starship dumps its Matter/Antimatter Reaction Assembly (M/ARA), also known as the Warp Core. Performed only in extreme emergencies, when a core breach is imminent, as the procedure will leave the ship without adequate power for defending itself. The antimatter storage tanks are dumped at the same time, since without the core the ship will not be able to maintain a magnetic field which is required to separate the antimatter from the walls of the tanks.