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One who makes jokes and uses sarcasm in an attempt to seem witty, but instead is deemed annoying. Also seen as "smart alec." I'd had enough of that smart aleck's wisecracks, so I left the party early.
smart alec (or aleck)a person considered irritating because they know a great deal or always have a clever answer to a question.
From the male personal name Alec, a short form of Alexander.