Lewis & Short

vānĭlŏquus (-lŏcus), a, um, adj. [vanus-loquor], talking emplily or idly, gabbling, prating, i. e.,

  1. I. Lying: quia vanilocu’s, vapulabis, Plaut. Am. 1, 1, 223.Ambros. Ep. 63, 7.
  2. II. Boastful, bragging, vaunting, Liv. 35, 48, 2: ore, Sil. 14, 280: genus, id. 8, 17.