The Collaborative International Dictionary of English v.0.48:

Ribaldry \Rib"ald*ry\, n. [OE. ribaldrie, ribaudrie, OF.
   ribalderie, ribauderie.]
   The talk of a ribald; low, vulgar language; indecency;
   obscenity; lewdness; -- now chiefly applied to indecent
   language, but formerly, as by Chaucer, also to indecent acts
   or conduct.
   [1913 Webster]

         The ribaldry of his conversation moved ?stonishment
         even in that age.                        --Macaulay.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ribaldry
    n 1: ribald humor
    2: behavior or language bordering on indelicacy [syn:
       gaminess, raciness, ribaldry, spiciness]

The Devil's Dictionary (1881-1906):

RIBALDRY, n.  Censorious language by another concerning oneself.