Ribaldry

[Sarah]

The talk of a ribald; low, vulgar language; indecency;obscenity; lewdness; -- now chiefly applied to indecent language, butformerly, as by Chaucer, also to indecent acts or conduct.The ribaldry of his conversation moved Macaulay.

[Dave Paprocki]

language that refers to sex in a rude but humorous way:

[Hina Muqadas]

Amusingly coarse or irreverent talk or behavior.