mule
n.
1. A carrier of things for someone else; often used to refer to a carrier of illegal drugs, or a video game character who functions as a holding space for items for another character.

v.
1. To hold or transit for someone else.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

The offspring of a mare and a jackass. Useful as a plough animal, and also a fine ride in rugged terrain. These creatures are almost always sterile. They have the coat of a horse and the voice of a donkey.

An acronym used by military officers to describe all the women around them as either: married, ugly, lesbian, or enlisted.

Massively Multiplayer Online Role Playing Game term. Used to define extra characters that are created for the soul purpose of extra item slots.

The outcome of when a donkey and a horse get it on.

Another name for the male genitalia.