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Vinony

piston

noun

  1. moving component of reciprocating engines that is contained by a cylinder and is made gas-tight by piston rings
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Wiktionary

Pronunciation: /ˈpɪstən/

name

  1. A surname.

noun

Etymology: Etymology tree French pistonbor. English piston Borrowed from French piston.

  1. A solid disk or cylinder that fits inside a hollow cylinder, and moves under pressure (as in an engine) or displaces fluid (as in a pump)
  2. A valve device in some brass instruments for changing the pitch

verb

Etymology: Etymology tree French pistonbor. English piston Borrowed from French piston.

  1. To move up and down or in and out like a piston.

    “The Latino warrior fucked like a man possessed. His lean hips powered the pistoning rod in short, vicious jabs, so rapidly that the shit-streaked cock was a blur as it pounded Captain Randall's butthole, churning the screaming soldier's ass-juices, rectal blood, and smashed turds into a slimy froth.”