Lewis & Short

lĕvĭcŭlus, a, um, adj. dim. [1. levis].

  1. * I. Very small, trivial, insignificant: quid significet prandium caninum, rem leviculam, diu et anxie quaesivimus, Gell. 13, 31, 15.
  2. II. Somewhat light-minded, vain: leviculus sane noster Demosthenes, qui, etc., Cic. Tusc. 5, 36, 103.