scurrilous (adj.) Look up scurrilous at Dictionary.com
"using such language as only the licence of a buffoon can warrant" [Johnson], 1570s, from scurrile "coarsely joking" (c.1500, implied in scurrility), from Latin scurrilis "buffoonlike," from scurra "fashionable city idler, man-about-town," later "buffoon." According to Klein, "an Etruscan loan-word." Related: Scurrilously; scurrilousness.