Constantly complaining or finding fault with things in an annoying or petty way.
From the verb 'carp', meaning to complain, which comes from Old Norse 'karpa'. The '-ing' suffix makes it an adjective describing someone's behavior.
The word 'carp' for complaining might actually come from the fish itself—maybe because fishermen got tired of carping (complaining) about their catches, the word stuck around.
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