Collins Concise English Dictionary © HarperCollins Publishers::

smart aleck /ˈælɪk/ n ( pl smart alecks)
  1. informal an irritatingly oversmart person
Etymology: 19th Century: from Aleck, Alec, short for Alexander

ˈsmart-ˌaleck, ˈsmart-ˌalecky adj

'smart aleck' also found in these entries:
In the English description:

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