Lewis & Short

bŏvīnātor, ōris, m. [bovinor].

  1. I. A brawler, blusterer, reviler, acc. to the Gloss.: bovinatores θορυβοποιοί, θρύλλον ποιοῦντες ἠ ταραχήν; v. bovinor.
  2. II. = tergiversator, one who seeks evasions (the figure drawn perh. from the holding back of draught cattle), Lucil. ap. Gell. 11, 7, 9; cf. Non. p. 79, 26.