scupper

from The Century Dictionary.

• noun Nautical, an opening in the side of a ship at the level of the deck, or slanting from it, to allow water to run off; also, the gutter or channel surrounding the deck, and leading to such openings: often in the plural.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Naut.) An opening cut through the waterway and bulwarks of a ship, so that water falling on deck may flow overboard; -- called also scupper hole.
• noun (Naut.) a pipe of leather, canvas, etc., attached to the mouth of the scuppers, on the outside of a vessel, to prevent the water from entering.
• noun (Naut.) a nail with a very broad head, for securing the edge of the hose to the scupper.
• noun (Naut.) a plug to stop a scupper.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb UK Thwart or destroy, especially something belonging or pertaining to another; compare scuttle.
• noun nautical A drainage hole on the deck of a ship.
• noun architecture A similar opening in a wall or parapet that allows water to drain from a roof.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun drain that allows water on the deck of a vessel to flow overboard
• verb wait in hiding to attack
• verb put in a dangerous, disadvantageous, or difficult position