confidentiloquus

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

confīdentĭlŏquus, a, um, adj. [confidens-loquor],

speaking confidently or audaciously; in comp. : nihil est confidentiloquius quam urbani adsidui cives, quos scurras vocant, Plaut. Trin. 1, 2, 164.