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tinhorn

[tin-hawrn]Slang.
noun
  1. someone, especially a gambler, who pretends to be important but actually has little money, influence, or skill.
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adjective
  1. cheap and insignificant; small-time: a tinhorn racket.
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Origin of tinhorn

An Americanism dating back to 1880–85; tin + horn
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for tin horn

tinhorn

noun
  1. a cheap pretentious person, esp a gambler with extravagant claims
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adjective
  1. cheap and showy
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for tin horn

tinhorn

adj.

"petty but flashy," 1857, from tin + horn (n.); originally of low-class gamblers, from the tin cans they used for shaking dice.

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Online Etymology Dictionary, © 2010 Douglas Harper