mule

tohveli

muuli A generally sterile male or female hybrid offspring of a male donkey and a female horse.
A generally sterile hybrid offspring of any two species of animals.
A hybrid plant.
puhekieltä A stubborn person.
puhekieltä A person paid to smuggle drugs.
puhekieltä A coin or medal minted with obverse and reverse designs not normally seen on the same piece, either intentionally or in error.
puhekieltä A MMORPG character, or NPC companion in a tabletop RPG, used mainly to store extra inventory for the owner's primary character.
2007, David L. McClard, Verotopia Online: The MMORPG of the Century, Xlibris (2007), ISBN 9781425772895, http://books.google.com/books?id=fbEo_Kz7DikC&pg=PA89 page 89:

He was in the middle of organizing his massive stash of rare and exquisite bounty, all kept safely in the inventory cache of a mule, an entirely separate character which he paid a monthly fee to maintain exclusively for that purpose.

There are many drug lords, each with his own corridor (think of it as a franchise of sorts) funneling narcotics into Texas. There are multifold methods of transport. The old, and still viable, way is to "mule" it across the Rio Grande in a small boat.

Thornton was supposed to mule it back to the States from one of the ports he stopped in, give it to Maxwell and Ames, and get the second half of a quarter-million.

The bride was a shocking housekeeper and dragged round all day in boudoir cap, frowsy negligee and mules—slip, slop, slip, slop.