What does Rikki tikki tavi mean in Hindi?

"Rikki tikki tavi" is not a Hindi phrase. It is the name of the protagonist in Rudyard Kipling's short story "Rikki-tikki-tavi," a mongoose.

While the words themselves are not Hindi, the name might be based on the sound of a mongoose's call.

The story is set in India and uses some Hindi words, but "Rikki tikki tavi" itself is not a Hindi phrase.