tumbler

plural tumblers

1. archaicOne who tumbles; one who plays tricks by various motions of the body.

   […] the tricks of tumblers, funambuloes, baladines […]

   1605, Francis Bacon, “(please specify |book=1 or 2)”, in The Twoo Bookes of Francis Bacon. Of the Proficience and Aduancement of Learning, Diuine and Humane, London: […] [Thomas Purfoot and Thomas Creede] for Henrie Tomes, […], →OCLC

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   […] and yokels looking up at the tinselled dancers and poor old rouged tumblers, while the light-fingered folk are operating upon their pockets behind.

   1848 June 28, William Makepeace Thackeray, “Before the Curtain”, in Vanity Fair […], London: Bradbury and Evans […], →OCLC, page vii

   Synonyms: 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. A device for smoothing and polishing rough objects that are placed inside its rotating chamber.

   rock tumbler

4. 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 sear point to enter.
5. A drinking glass that has no stem, foot, or handle — so called because such glasses originally had a pointed or convex base and could not be set down without spilling. This compelled the drinker to finish their measure.

   I poured out some whisky into a tumbler, and gave it to him.

   1886 October – 1887 January, H[enry] Rider Haggard, She: A History of Adventure, London: Longmans, Green, and Co., published 1887, →OCLC

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   "You don't think it's too early?" said the Captain. "You and your liver must decide that between you," I replied. "I'm practically a teetotaller," he said, as he poured himself out a good half-tumbler of Canadian Club.

   1919, W[illiam] Somerset Maugham, “chapter 46”, in The Moon and Sixpence, [New York, N.Y.]: Grosset & Dunlap Publishers […], →OCLC

6. A variety of the domestic pigeon remarkable for its habit of tumbling, or turning somersaults, during its flight.
7. A beverage cup, typically made of stainless steel, that is broad at the top and narrow at the bottom commonly used in India.
8. Something that causes something else to tumble.
9. obsoleteA dog of a breed that tumbles when pursuing game, formerly used in hunting rabbits.
10. ScotlandUKdialectalobsoleteA kind of cart; a tumbril.
11. biologyThe pupa of a mosquito.
12. One of a set of levers from which the heddles hang in some looms.
13. obsoleteA porpoise.
14. businessA service that mixes potentially identifiable or 'tainted' cryptocurrency funds with others, so as to obscure the audit trail; used for money laundering.

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    The Department of Justice said it has arrested a Russian-Swedish national who allegedly operated a long-running cryptocurrency laundering site. According to a news release from the DOJ, Roman Sterlingov ran Bitcoin Fog, a cryptocurrency tumbler or “mixer”— which hides a cryptocurrency’s source by mixing it with other funds.

    2021 April 29, Kim Lyons, “Feds arrest founder of bitcoin ‘mixer’ they say laundered $335 million over ten years”, in The Verge

    Synonyms: mixer