Illustrated Companion to the Latin Dictionary/Crepitus

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

CREP'ITUS, sc. digitorum; or concrepare digitis. A snapping of the fingers by pressing the tip of the thumb (hence pollex argutus, Mart. vi. 89.) firmly against the middle finger, a gesture employed by the ancients for making a sign to attract observation (Cic. Agr. ii. 30.); particularly as a summons to their slaves (Pet. Sat. 27. 5. Mart. Ep. xiv. 19. Id. iii. 82.); and, in general, as a mark of contemptuous indifference; which latter expression is implied by the figure in the engraving (Crepitus/1.1), representing a drunken Faun, from a statue found at Herculaneum, as it were in the act of exclaiming, "Eat, drink, and be merry; all else is not worth this snap of the fingers."

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  Crepitus/1.1