Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Informal A smart aleck.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A self-assertive and arrogant person; a know-it-all or smart aleck.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an upstart who makes conceited, sardonic, insolent comments

Etymologies

wise1 + German -enheimer (in such surnames as Oppenheimer).
(American Heritage® Dictionary of the English Language, Fourth Edition)
wise + German surname suffix -enheimer (Wiktionary)

Examples

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