Lewis & Short

per-făcētus, a, um, adj., very witty, very facetious (class.).
Of persons, Cic Brut. 27, 105.
Of words: aliquid perfacetum dicere, Cic. Planc. 14, 35.
Adv.: per-făcētē, very wittily: perfacete dicta, Cic. Verr. 2, 1, 46, § 121.