1. Ribald
vulgar or indecent in speech, language, etc.; coarsely mocking, abusive, or irreverent; scurrilous.

2. Etymology
c.1240, "a rogue, ruffian, rascall, scoundrell, varlet, filthie fellow" [Cotgrave], from O.Fr. ribalt, of uncertain origin,
perhaps from riber "be wanton, sleep around,"
from a Gmc. source (cf. O.H.G. riban "be wanton," lit. "to rub," possibly from the common euphemistic use of "rub" words to mean "have sex"), from P.Gmc. *wribanan, from PIE base *wer- "to turn, bend" (see versus).
The adj. is attested from 1500, from the noun.
Ribaldry is recorded from c.1300.

3. Sentence
“To his sympathetic mind, the creed of optimism is a ribald insult to the pain of humanity and devout piety merely absurd.”
Essays on Modern Novelists - By William Lyon Phelps

4. Sentence
“Men and women, boys and girls, trotted along beside or after the cart, hooting, shouting profane and ribald remarks, singing snatches of foul song, skipping, dancing--a very holiday of hellions, a sickening sight.”
A Connecticut Yankee in King Arthur's Court - By Mark Twain

5. Sentence
“You have told us of their gloating lips; you heard their ribald laugh as they clutched the moving bag that the Count threw to them.”
Bram Stoker, Philip M. Parker, Dracula - By Poul Glargaard

6. All That is Ribald:
off-color jokes
bawdy songs
drunkenness