subs. (colloquial).—A stupid ignoramus. For synonyms, see BUFFLE and CABBAGE-HEAD. Also JACKASSISM = stupidity.

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  1837.  R. H. BARHAM, The Ingoldsby Legends, ‘The Wedding-day,’ II, 268.

        Calling names, whether done to attack or to tack a schism,
Is, Miss, believe me, a great piece of JACK-ASS-ISM.

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