elfism

The English word “elfism” has 3 meanings listed here.

noun

The belief in elves as supernatural beings.
An elflike saying, based on fictional depictions such as the movie Elf or puns on the word elf.
The quality or state of being elflike; elfishness.

From elf + -ism.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.