Actually this word (at least in it's latin transcription) means a female dog. Not too offencive, but it usually comes from mouth of a rough people or even prisoner who angry and wants to bite you.

and it's easy to frighten me, I'm a very cowardly dog!
:)

But okay, I have no intentions to insist on changing it, because a lot of words will be prohibited then (who knows, may be some simple word have very bad meaning in some of hundreds languages)

Courage, the Cowardly Dog.