Elegant and delicate wit. Salt, both in Latin and Greek, was a common term for wit, or sparkling though well expressed: thus Cicero says, "Scipio omnes sale superabat" (Scipio surpassed all in wit). The Athenians were noted for their wit and elegant turns of thought, and hence Attic salt means wit as pointed and delicately expressed as by the Athenians. "Attic point," wit.
E. Cobam Brewer. Brewer's Dictionary of Phrase and Fable (1894)
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wit, humour, pleasantry. Partly a reference to a suggestive portion of Grecian literature, and partly a sly hit at the well-known poverty of many writers.
John Camden Hotten. The Slang Dictionary (1913)
► uses
Uses:
Sergey Ivanovitch was unequaled in his skill in winding up the most heated and serious argument by some unexpected pinch of Attic salt that changed the disposition of his opponent. He did this now.
Leo Tolstoy. Anna Karenina (Translated by Constance Garnett)