What does scupper mean?
Scupper is chiefly a verb meaning to defeat or bring down an opponent, plan, or undertaking, often so decisively that it cannot recover. It can also mean to weaken or disable something, while in maritime English it describes the act of sinking a ship and the opening in a ship's side or deck through which water runs overboard. Figurative uses such as “the defeat scuppered the project” are established but somewhat formal and uncommon in casual conversation; the nautical senses remain technical. The word is memorable because its range moves from a small opening that helps a vessel shed water to a forceful verb for ruining an adversary or spoiling an endeavor. It also serves as a vivid synonym for “undermine,” “disable,” or “bring down,” especially when the result is final rather than merely inconvenient. Outside nautical contexts, the metaphor usually implies decisive failure rather than physical destruction.
To defeat, overwhelm, bring down, or severely weaken an opponent or undertaking; in maritime use, to sink a ship.
"The surprising defeat scuppered the challenger's campaign."
Figurative uses are established but somewhat formal. The maritime sense of sinking a vessel is technical.
An opening in a ship through which water from the deck can run overboard.
"He cleared leaves from the ship's scupper before the storm arrived."
This is a specialized maritime term.
The plural is used when referring to multiple openings or drains in a ship or fleet of ships.
"The mate checked each scupper for blockage."
The word can mean destroying an enemy or ruining a plan, but it can also name the small drain that keeps a ship's deck from becoming a swimming pool.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does scupper come from?
The verb entered English through Middle French eschopper and Old French eschapper, ultimately from Latin excappare, a verb based on ex- (“out”) and capere (“take”). Its English senses developed from attacking or defeating an opponent to the modern meanings of overwhelming or weakening an enemy, undertaking, or plan. The maritime noun has a separate origin generally associated with Dutch nautical usage and with scooping or draining water from a ship's deck.
Related word forms
How scupper is actually used
The figurative verb is established but relatively uncommon in casual speech, and it often implies a decisive or final setback rather than a minor difficulty. The noun and the sense meaning to sink a ship are maritime and technical.