Found Filk

Filk songs which were not written as filk — and are by mundane artists — but which seem to be filk, anyway. For example, songs which contain stories such as many of the old ballads or songs which show a filkish love of incongruities. They are often not on stfnal themes. Examples include Tom Lehrer and Stan Rogers.

Sometimes the term adopted filk is used instead, focusing that it is a song which was made outside the fandom communities but is used within it.