tumbler

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

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

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

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.

A rotating device for smoothing and polishing rough objects, placed inside it, on relatively small parts.

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.

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.

"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.