What is "lubber's line"

Lubber \Lub"ber\, n. [Cf. dial. Sw. lubber. See Looby, Lob.] A heavy, clumsy, or awkward fellow; a sturdy drone; a clown.

Lingering lubbers lose many a penny.
--Tusser.

Land lubber, a name given in contempt by sailors to a person who lives on land.

Lubber grasshopper (Zo["o]l.), a large, stout, clumsy grasshopper; esp., Brachystola magna, from the Rocky Mountain plains, and Romalea microptera, which is injurious to orange trees in Florida.

Lubber's hole (Naut.), a hole in the floor of the ``top,'' next the mast, through which sailors may go aloft without going over the rim by the futtock shrouds. It is considered by seamen as only fit to be used by lubbers.
--Totten.

Lubber's line, Lubber's point, or Lubber's mark, a line or point in the compass case indicating the head of the ship, and consequently the course which the ship is steering.

n. a fixed line on a ship's compass indicating its heading [syn: lubber line, lubber's mark, lubber's point]