DUCK. The finest canvas (No. 8) for small sails, is sometimes so called; but it is really a lighter cloth than canvas, and is greatly used by seamen and soldiers on tropical stations for frocks and trousers. DUCKING. A penalty which veteran sailors inflict on those who, for the first time, pass the tropics, the equator, or formerly even the Straits of Gibraltar; and is usually performed in the grog-tub or half-butt, with the assistance of a few buckets of water; the usual fine, however, always prevents the penalty being inflicted. DUCKING AT THE YARD-ARM. A marine punishment unknown, except by name, in the British navy; but formerly inflicted by the French for grave offences, thus: the criminal was placed astride a short thick batten, fastened to the end of a rope which passed through a block hanging at the yard-arm. Thus fixed, he was hoisted suddenly up to the yard, and the rope being then slackened at once, he was plunged into the sea. This chastisement was repeated several times; conformable to the sentence, a gun advertised the other ships of the fleet thereof that their crews might become spectators. If the offence was very great, he was drawn underneath the keel of the ship, which was called keel-hauling. (_See_ KEEL-HAULING.) DUCKS. The general name for a sailor's dress in warm climates. Also, the military English of Bombay. _See also_ JEMMY DUCKS, the keeper of the poultry on board ship. Dried herrings, or Digby ducks in N. S. DUCK-UP! A term used by the steersman when the main-sail, fore-sail, or sprit-sail hinders his seeing to steer by a landmark, upon which he calls out, "Duck-up the clue-lines of those sails," that is, haul the sails out of the way. Also, when a shot is made by a chase-piece, if the clue of the sprit-sail hinders the sight, they call out, "Duck-up," &c. DUDGEON. An old word for the box-handle of a dirk; it is mentioned by Shakspeare with the blade of the ideal dagger which Macbeth saw before him. It also means offence, anger. DUDS. A cant term for clothes or personal property. The term is old, but still in common use, though usually applied to clothing of an inferior quality, and even rags and tatters. DUEL. A single combat at a time and place appointed in consequence of a challenge; a practice which had its uses and abuses, now prohibited. DUELLO. An Italian word expressive of duelling, long appropriated into our language. DUFF. Pudding or dough. DUFFERS. Low pedlars; also those women who assist smugglers. Also, cowardly fellows. DUG-OUT. A canoe. DUKE OF YORK. A nickname for a particular storm trysail used in the northern seas. DULCE, DULSE, DELSE. _Iridea dulce_, one of the edible fuci. It is an article of trade in America and Holland, and is plentiful on the rocky coasts of Ireland and western England. It probably derived its name from being sweet and pleasant, not requiring cooking.