mule

Short definition from Wiktionary

Noun

1. 1
   The generally sterile male or female hybrid offspring of a male donkey and a female horse.
2. 2
   The generally sterile hybrid offspring of any two species of animals.
3. 3
   A hybrid plant.
4. 4
   A stubborn person.
5. 5
   A person paid to smuggle drugs.
6. 6
   A coin or medal minted with obverse and reverse designs not normally seen on the same piece, either intentionally or in error.
7. 7
   A MMORPG character, or NPC companion in a tabletop RPG, used mainly to store extra inventory for the owner's primary character.
8. 8
   Any of a group of cocktails involving ginger ale or ginger beer, citrus juice, and various liquors.
9. 9
   A kind of triangular sail for a yacht.
10. 10
    A kind of cotton-spinning machine.
11. 11
    Any shoe with an upper covering the front of the foot but without a back flap or strap, leaving the heel exposed.

Verb

1. 1
   To smuggle (illegal drugs).

Proper noun

1. 1
   A surname.