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smart ass

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noun Slang: Sometimes Vulgar.
  1. a wise guy; know-it-all.
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Also smart·-ass·, smart·ass.

Origin of smart ass

First recorded in 1905–10

smart-ass

[smahrt-as]Slang: Sometimes Vulgar.
adjective
  1. Also smart-assed, smart·assed. characteristic of a smart ass or wise guy.
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noun
  1. smart ass.
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Origin of smart-ass

First recorded in 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Word Origin and History for smartass

smart-ass

also smartass, 1960 (adj.), 1962 (n.), from smart (adj.) + ass (n.2).

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Online Etymology Dictionary, © 2010 Douglas Harper