upper deck

== English == === Noun === upper deck (plural upper decks) (nautical) The topmost full-length deck of a ship. ==== Translations ==== === Verb === upper deck (third-person singular simple present upper decks, present participle upper decking, simple past and past participle upper decked) (slang, transitive) To perform the upper decker prank in the cistern of (a toilet). (slang, transitive) To place a snus or Zyn pouch under the upper lip.