scurrilous
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`Using such language as only the licence of a buffoon can warrant'
(J.); characterized by coarseness or indecency of language, esp. in
jesting and invective; coarsely opprobrious or jocular.

    Hence {sm}scurrilously adv., in a scurrilous manner; {dag}after the
manner of a buffoon. Also {sm}scurrilousness.