An off-color and irreverent comment about sex is an example of something that would be described as a ribald comment.
Origin of ribaldMiddle English ribaude from Old French ribaud, debauchee from riber, to be wanton from Old High German riban, to copulate, literally , to rub from Indo-European an unverified form wreip-, to twist from source Classical Greek rhip?, a throw, rush, storm
Origin of ribaldFrom Middle English ribaud ribald person from Old French from riber to be wanton from Middle High German rīban to rub, be in heat, copulate from Old High German; see wer-2 in Indo-European roots.
(comparative more ribald, superlative most ribald)
- An individual who is filthy or vulgar in nature.
From Middle English, from Old French ribaud, ribauld (“rogue, scoundrel") (> French ribaud), from riber (“to be licentious"), from Frankish *rÄ«ben (“to copulate, be in heat", literally “to rub"), from Proto-Germanic *wrÄ«banÄ… (“to turn, twist"), from Proto-Indo-European *werp-, *werb- (“to turn, twist") + Old French -auld, from Old Frankish *-wald. Cognate with Old High German rÄ«ban (“to rub"), Dutch wrijven (“to rub"). Compare also Old High German hrÄ«ba (“prostitute"). More at wrap.