Sometimes you may hear the most unexpected or even ridiculous things in your dreams, whether they are said by people, animals or even objects.
If you simply can’t understand what someone is saying to you, look first of all at whether what they are saying is being cloaked in metaphor. Bear in mind, too, that an unexpected utterance by a dream character may be giving rise to something you are not ready to hear; sometimes we put our unconscious fears into someone else’s mouth, or the utterances represent old issues or negative voices you have not yet banished.
Freudian slips are everyday occurrences in which we express strange or unacceptable thoughts or urges. For a split second, the censoring aspect of your self is put on hold and what is really on your mind pops out in a seemingly bizarre and unexpected way. These slips happen in every day speech as well as in dreams, so if verbal mistakes or slips appear in your dream—such as ’I thought you were dead instead of retired’—they will tell you something about your unconscious wishes. It is possible to have a dream in which you say the most unexpected and embarrassing but secretly true thing to a dream character.... The Element Encyclopedia