Cat-O-Nine 

A whip with several strips of leather at the end

Caterina takes her cat-o-nine with her everywhere, often stopping to whip random people.

Cat-O-Nine by miss d June 18, 2003

Cat o' nine tails

A type of whip formerly used as a torture device, mostly for lashes in punishment of crimes. It is now used by BDSM partners, though usually without the death and severe wounds.

We hope.

My ass still hurts from that cat o' nine tails she used on me.

Cat o' nine tails by DeaMatrona January 19, 2012

cat o' nine tails

A whip, usually leather, with nine tails. A variation on the Egyptian flail. Hurts a lot. Often used in bondage.

Sometimes, my lover ties me to the bed and uses the cat o' nine tails on me.

cat o' nine tails by naughty kitten August 7, 2004