The cat o' nine tails is a type of multi-tailed whipping device.
Cat o' nine tails may also refer to:
- Typha latifolia, the Cat O' Nine Tails plant
Books
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- Cat O'Nine Tails (novel), a 2009 children's novel by Julia Golding
- Cat O'Nine Tails, 1971 novel by Paul Gillette from screenplay by Dario Argento
- Cat O'Nine Tales, a 2006 collection of short stories by Jeffrey Archer
- Cat of Many Tails, Ellery Queen
Film and TV
- The Cat o' Nine Tails, a 1971 Italian giallo thriller film
Music
- Cat O' Nine Tails, a 1988 composition for string quartet by John Zorn