effrontery Copy link • effrontery: ōs, ōris, n. (by meton.): you know the e., the audacity of the fellow, nosti os hominis, nosti audaciam, Cic.: nor is it that you have more courage, but more e., nec tibi plus cordis, sed magis oris inest, Ov. More fully, duritia oris, Sen. Phr.: to assume e. and banish modesty, perfricare frontem [or os], ponere pudorem, Mart.: Cic.: v. shamelessness.