Sui generis
In sociology, the "sui generis" is what has been externalized, then internalized in the overall public and becomes a part of society that simply exists in its construct. It is not something that is not thought to have been created, because it is imbedded in everyone's way of thinking and being. Instances include the idea of love, or going to school, or clothing belonging to a specific gender. These examples are "sui generis" for they simply exist in society and are widely accepted without thoughts of where they come from or how they were created.
Pensions in the United Kingdom
These are type "sui generis" as they either reward a career in domestic politics or are awarded in the colonial context not on grounds of justice, contract or socio-economic merits, but as a political decision, in order to take a politically significant person (often deemed a potential political danger) out of the picture by paying him or her off, regardless of seniority.