/ ˈrɪbld; NAmE ; ˈraɪbɔːld/ adjective
( of language or behaviour ) referring to sex in a rude but humorous way
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WORD ORIGIN
Middle English (as a noun denoting a lowly servant or a licentious or disrespectful person): from Old French ribauld , from riber indulge in licentious pleasures, from a Germanic base meaning prostitute.