(noun)- A peasant dirt farmer of the foolish type. Predominately from the Nigerian motherland. Lover of fine wines, long walks on the beach, and big veiny cocks. The Usen species typically are lone hunters for prey such as ugly British girls with bad teeth and already used Mexican cabooses. Usens are typically too foolish to pose any real threat to humans yet if riled up, they may be sedated with two cans of beer...which renders them completely useless.

Synonym for "used." Although it has the same meaning, it is not always used in the same context.

For example, you can say:
-I've used the shovel.
and
-I've usen the shovel.

And you can say:
-I used the shovel.

But you can't say:
-I usen the shovel.

So, in the end, it's just a word that replaces used and sound better in some cases.