Stfsy

noun, slang

noun, slang ·Uncommon ·College level

Definitions

Noun
  1. 1
    The overall genre containing science fiction and fantasy; speculative fiction. dated, slang, uncountable

Etymology

Either abbreviation of scientifantasy, or blend of stf (“scientifiction”) + fantasy.

Related phrases

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.