Feel free to call your annoying younger cousin a wisenheimer, especially if he is an irritatingly smug show-off.

The word wisenheimer, more or less a synonym of "smart aleck," is taking on a rather old-fashioned feel these days which it's fully entitled to, being more than 100 years old. It's an American coinage, slotted into a familiar sound pattern of surnames ending in -heimer, which is probably the legacy of nineteenth and twentieth century German immigration.

Definitions of wisenheimer
  1. noun
    an upstart who makes conceited, sardonic, insolent comments
    synonyms: smart aleck, weisenheimer, wise guy, wiseacre
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    type of:
    an arrogant or presumptuous person
Word Family

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