Do you remember Watson, IBM's super AI which socked two human players at Jeopardy? Well, it seems that an experimenter played Frankenstein and let the beast awakens after a visit to Urban Dictionary. A now potty-mouthed Watson had to be piped down and refrained from going on curse parades. Other reference and here.
Maybe a new AI test is needed: after the Turing test, let's have the Tourette test!