Lewis Short
gurdus (noun M) : Spanish
* A dolt, jolterhead, numskull: gurdos, quos pro stolidis accipit vulgus, ex Hispania duxisse originem audivi,Quint. 1, 5, 57; cf.: gurdus lentus, inutilis, Gloss. Isid.; Laber. ap. Gell. 16, 7, 8 (Com. Fragm. v. 13 Rib.).
Charlton T. Lewis, Charles Short, A Latin Dictionary