Rat-tail a. : Like a rat's tail in form; as, a rat-tail file, which is round, slender, and tapering. See Illust. of File.

Rat-tail n. : An excrescence growing from the pastern to the middle of the shank of a horse.

Rat-tail n. : The California chimaera. See Chimaera.

Rat-tail n. : Any fish of the genus Macrurus. See Grenadier, 2.

Example:
How do you care for a rat tail hair cut on a woman?

Taxonomy
Rat Tail, mullet, the Rat, Rat Tails, Adult, Gangsta, adolescents, Junky, Rick, lonely life, shoulder, hair, Tristan, mull, general public, upside down, rare species, rarity.

Defination from the web:
rat tail, much more than the mull. People are generally anti-rat. ... A rare, rare species has just been hunted....A female rat tail. These are VERY uncommon(same rarity as the homullsexual) ...