Definitions for "Jetsam"
Goods which sink when cast into the sea, and remain under water; -- distinguished from flotsam, goods which float, and ligan (or lagan), goods which are sunk attached to a buoy.
The act of throwing objects from a ship to lighten the load; jettison{1}. See Jettison, 1.
Anything thrown overboard from a ship, whether floating or not.
Objects scattered about in a disorderly manner; as, he couldn't find his sneakers among the jetsam in his room.