Snap flask

Snap \Snap\, n. [Cf. D. snap a snatching. See {Snap}, v. t.]
   1. A sudden breaking or rupture of any substance.
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   2. A sudden, eager bite; a sudden seizing, or effort to
      seize, as with the teeth.
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   3. A sudden, sharp motion or blow, as with the finger sprung
      from the thumb, or the thumb from the finger.
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   4. A sharp, abrupt sound, as that made by the crack of a
      whip; as, the snap of the trigger of a gun.
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   5. A greedy fellow. --L'Estrange.
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   6. That which is, or may be, snapped up; something bitten
      off, seized, or obtained by a single quick movement;
      hence, a bite, morsel, or fragment; a scrap.
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            He's a nimble fellow,
            And alike skilled in every liberal science,
            As having certain snaps of all.       --B. Jonson.
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   7. A sudden severe interval or spell; -- applied to the
      weather; as, a cold snap. --Lowell.
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   8. A small catch or fastening held or closed by means of a
      spring, or one which closes with a snapping sound, as the
      catch of a bracelet, necklace, clasp of a book, etc.
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   9. (Zool.) A snap beetle.
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   10. A thin, crisp cake, usually small, and flavored with
       ginger; -- used chiefly in the plural.
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   11. Briskness; vigor; energy; decision. [Colloq.]
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   12. Any circumstance out of which money may be made or an
       advantage gained. [Slang]
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   13. Any task, labor, set of circumstances, or the like, that
       yields satisfactory results or gives pleasure with little
       trouble or effort, as an easy course of study, a job
       where work is light, a bargain, etc. [Slang, Chiefly U.
       S.]
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   14. A snap shot with a firearm.
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   15. (Photog.) A snapshot.
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   16. Something of no value; as, not worth a snap. [Colloq.]
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   17. (Football) The action of snapping the ball back, from the
       center usu. to the quarterback, which commences the play
       (down), and, if the clock had stopped, restarts the timer
       clock; a {snap back}.
       [PJC]

   {Snap back} (Football), the act of snapping back the ball.

   {Snap beetle}, or {Snap bug} (Zool.), any beetle of the
      family {Elateridae}, which, when laid on its back, is able
      to leap to a considerable height by means of a thoracic
      spring; -- called also {snapping beetle}.

   {Snap flask} (Molding), a flask for small work, having its
      sides separable and held together by latches, so that the
      flask may be removed from around the sand mold.

   {Snap judgment}, a judgment formed on the instant without
      deliberation.

   {Snap lock}, a lock shutting with a catch or snap.

   {Snap riveting}, riveting in which the rivets have snapheads
      formed by a die or swaging tool.

   {Snap shot}, a quick offhand shot, without deliberately
      taking aim.
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