Lewis & Short

pĕr-haurĭo, si, stum, 4, v. a.

  1. I. Lit., to drain completely, to drink up: calicem uno haustu, App. M. 10, p. 246, 39; Tert. ad Nat. 1, 15.
  2. II. Trop.: auribus perhauriendum’st, Plaut. Mil. 1, 1, 34.