fan service
n.— «I think the movie was made for fan service and/or to investigate the potential market for bigger project.» —“Re: Silent Mobius” by tkim@sdcc6.ucsd.edu (Tonghyun Kim) Usenet: rec.arts.anime Nov. 15, 1991. (source: Double-Tongued Dictionary)
Further reading
The character of Deadpool Marvel Comics and movie fame takes his name from the term dead pool, originally death pool — originally a sum of money put aside for the family of someone who died in a high-risk race such as car racing, then later...
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...