Seneca Maior Controversiae 2,4,11

Cassius Severus, an able orator, resembling a gladiator in appearance, was hated and feared for his bitter tongue.
Seneca Maior in his Controversiae 2,4,11 tells of a rather virulent remark of Cassius who defined the character and capacity of Paullus Fabius Maximus(a powerful aristocrat with connextions in the highest possible circle),
Cassius said:“ quasi disertus es, quasi formosus es, quasi dives es:unum tantum es non quasi, vappa"
(" You are eloquent in a way, handsome in a way, loaded in a way;and a villain in every way”)

(For this, and many other verbal attacks on men in powerful positions, among whom even Augustus himself, Cassius was prosecuted, condemned, and banished to the island of Crete, (possibly in A.D.12?) but he remained a nuisance to the regime and after twelve years they removed him to the barren rock Seriphus in the Aegian Sea where he lived and died in misery)
(Tacitus, Ann. 1,72, 4,21; Dio, 56.27,1; Suet.Vitellius, 2,1, Augustus 56 ect.)