Definitions from Wiktionary ( )

▸ noun:  Someone or something that bumps.
▸ noun:  (obsolete) A drinking vessel filled to the brim.
▸ noun:  (colloquial, now chiefly attributive) Anything large or successful.
▸ noun:  (automotive) Parts at the front and back of a vehicle which are meant to absorb the impact of a collision; fender.
▸ noun:  Any mechanical device used to absorb an impact, soften a collision, or protect against impact.
▸ noun:  (cricket) A bouncer.
▸ noun:  (billiards) A side wall of a pool table.
▸ noun:  A cylindrical object used (as a substitute for birds) to train dogs to retrieve.
▸ noun:  (broadcasting) A short ditty or jingle used to separate a show from the advertisements.
▸ noun:  (slang, dated) A covered house at a theatre, etc., in honour of some favourite performer.
▸ noun:  (slang, Caribbean, Jamaica) A woman's posterior, particularly one that is considered full and desirable.
▸ noun:  (music) An extra musician (not notated in the score) who assists the principal French horn by playing less-exposed passages, so that the principal can save their 'lip' for difficult solos. Also applied to other sections of the orchestra.
▸ noun:  (pinball) An object on a playfield that applies force to the pinball when hit, often giving a minor increase in score.
▸ noun:  (Australia, slang) A cigarette butt.
▸ noun:  (horse racing) In National Hunt racing, a flat race for horses that have not yet competed either in flat racing or over obstacles.
▸ noun:  (video games) A shoulder button on a gamepad.
▸ adjective:  (colloquial) Wonderfully large; (as if) filled to the bumpers at the top of a silo.
▸ verb:  (obsolete, intransitive) To drink from the vessels called bumpers.

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