(adjective) : ŏpĭcus, a, um, a fuller form for Opsus, Obscus, and Oscus, lit. Oscan; cf. Paul. ex Fest. p. 188 Müll.; hence, transf.
* Clownish, rude, stupid, ignorant, foolish (not in Cic.): (Graeci) nos quoque dictitant barbaros et spurcius nos quam alios opicos appellatione foedant, M. Cato ap. Plin. 29, 1, 7, § 14: ut nostri opici putaverunt,Gell. 13, 9, 4: chartae,rough, coarse, unpolished,Aus. Prof. 22: amica,Juv. 6, 454: opici mures, barbarians of mice, that gnaw books, id. 3, 207.

s. TLL