To sing a song based on sci-fi, borrowing a tune from another song, but replacing the words to relate to a chosen sci-fi show.
A cross between 'fi' and 'folk'.
1- Where's Tom?
2- He's gone filking at the sci-fi convention.
1- Why's that?
2- I think he just felt like a filk
fucking milking it.
I'm working over time and right now I'm all caught up and just filking the time.