rat-tail

Noun

• A towel that has been tightly twisted along the diagonal to make a rudimentary whip with a towel corner at the tip, typically used in juvenile pranks.
• An excrescence growing from the pastern to the middle of the shank of a horse.
• A fish, the California chimera, Hydrolagus colliei (species), syn. Chimaera colliei (species).
• Any fish of the genus Macrourus (genus); a grenadier.