Avoid "false speech" that will be breaking the 5
precepts if you have taken it.
From
http://www.accesstoinsight.org/lib/authors/thanissaro/speech.html
Right speech, explained in negative terms, means avoiding four
types of harmful speech: lies (words spoken with the intent of
misrepresenting the truth); divisive speech (spoken with the intent
of creating rifts between people); harsh speech (spoken with the
intent of hurting another person's feelings); and idle chatter
(spoken with no purposeful intent at all).
In positive terms, right speech means speaking in ways that are
trustworthy, harmonious, comforting, and worth taking to heart.
When you make a practice of these positive forms of right speech,
your words become a gift to others. In response, other people will
start listening more to what you say, and will be more likely to
respond in kind. This gives you a sense of the power of your
actions: the way you act in the present moment does shape
the world of your experience. You don't need to be a victim of past
events.
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Well, i think it is okay to sing song talk cock but
then it also depends on the topic
and your intention. If you put yourself in someone else
shoes: I don't think you will like being gossiped about...
will you?