Lewis Short
dēsultor (noun M) : id.
* A leaper, vaulter, the technical designation of a sort of riders, who, in the circus-games, leaped from one horse to another without stopping.
* Prop., Varr. R. R. 2, 7, 15; Liv. 23, 29; 44, 9; Manil. 5, 85.
* Trop., a fickle, inconstant person: amoris,an inconstant lover,Ov. Am. 1, 3, 15; cf. bellorum,Sen. Suas. 1, § 8.
Charlton T. Lewis, Charles Short, A Latin Dictionary