Lewis & Short

caupo (also cōpo and cūpo, Charis. p. 47 P.; cf. Isid. Orig. 20, 6, 7;

  1. I. the form copo, Cic. Clu. 59, 163; Inscr. Orell. 4169; Inscr. Momms. 5078), ōnis, m. [root cap-, to take in, receive, v. capio; cf. κάπηλος], a petty tradesman, huckster, innkeeper, Plaut. Aul. 3, 5, 35; Cic. Div. 1, 27, 51; Hor. S. 1, 1, 29 K. and H.; 1, 5, 4; Mart. 1, 57; Dig. 4, 9, 1 al.
  2. * II. Trop.: sapientiae atque facundiae, Tert. Anim. 3.