A masculine given name, typically a nickname for Alexander. In British slang, 'smart alec' refers to someone who acts in a know-it-all manner.
Shortened form of Alexander, from Greek 'Alexandros' meaning 'defender of men'. The name combines 'alexein' (to defend) and 'aner' (man). The 'smart alec' usage emerged in 1860s American slang.
The phrase 'smart alec' supposedly comes from Alec Hoag, a 1840s New York con man who thought he was cleverer than the police - until they caught him. This transformation of a personal name into a universal term for cockiness shows how individual reputation can reshape language forever.
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