Lewis & Short

bustŭārĭus, a, um, adj. [bustum], of or pertaining to the place where dead bodies were burned: gladiator, that fought at a funeral pile in honor of the dead, Cic. Pis. 9, 19; Tert. Spect. 11; cf. Serv. ad Verg. A. 10, 519 (Cicero so calls Clodius, in the passage cited, on account of a tumult which he caused at the funeral ceremonies that Cicero’s brother made in honor of Marius): moecha, she who prostitutes herself among tombs, Mart. 3, 93, 15: altare, upon which men were offered, Tert. Pall. 4: latro = bustirapus, Amm. 28, 1, 12.