tum·bler /ˈtʌmblɚ/
 杯子,一杯量,打滾的人,翻斤斗者


 Tum·bler n.
 1. One who tumbles; one who plays tricks by various motions of the body; an acrobat.
 2. A movable obstruction in a lock, consisting of a lever, latch, wheel, slide, or the like, which must be adjusted to a particular position by a key or other means before the bolt can be thrown in locking or unlocking.
 3. Firearms A piece attached to, or forming part of, the hammer of a gunlock, upon which the mainspring acts and in which are the notches for the sear point to enter.
 4. A drinking glass, without a foot or stem; -- so called because originally it had a pointed or convex base, and could not be set down with any liquor in it, thus compelling the drinker to finish his measure.
 5. Zool. A variety of the domestic pigeon remarkable for its habit of tumbling, or turning somersaults, during its flight.
 6. Zool. A breed of dogs that tumble when pursuing game. They were formerly used in hunting rabbits.
 7. A kind of cart; a tumbrel. [Prov. Eng. & Scot.]

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 tumbler
      n 1: a gymnast who performs rolls and somersaults and twists etc.
      2: a glass with a flat bottom but no handle or stem; originally
         had a round bottom
      3: a movable obstruction in a lock that must be adjusted to a
         given position (as by a key) before the bolt can be thrown
      4: pigeon that executes backward somersaults in flight or on
         the ground [syn: roller, tumbler pigeon]