Scuppers are openings that serve as drainage points in different contexts: ^{merriam-webster.com}+2 ^{1 2 3}

• On a ship, they are cut through the bulwarks to allow water falling on deck to flow overboard. ^{merriam-webster.com 1}
• In architecture, they are openings in walls or parapets that allow water to drain from a roof. ^{wiktionary.org 3}