The story
Clipping of emotional. Compound emocore first attested in 1986. Word emo first attested in 1988. Generally used as an umbrella term.
First known use, by meaning
- late 1990s-current A subgenre of late 1980s hardcore punk originating in Washington D.C., characterized by intense, highly emotional performances, dynamic shifts, and a departure from traditional punk song structures (also emocore).
- late 1990s-current A 1990s indie rock movement characterized by complex guitar work (often borrowing from math rock), dynamic shifts, arpeggiated melodies, and deeply introspective lyrics; commonly referred to as Midwest emo.
- late 1990s-current A commercially successful 2000s alternative rock and pop-punk movement characterized by theatricality, melancholic, or romantically frustrated themes, and highly polished production.
- late 1990s-current Electronic-infused subgenres incorporating aggressive, satirical, or hedonistic themes layered over post-hardcore or pop-punk foundations (e.g., crunkcore, neon pop-punk).
- early 1990s A person associated with a fashion or stereotype of that style of rock.
- early 1990s A participant in the heavily aestheticized 2000s and 2010s subculture.
- 2000s (by extension) A typically young individual whose outward persona is characterized by introspection, sensitivity, melancholy, or angst; considered to be overly emotional or who is associated with the emo subculture.
Etymology from Wiktionary, CC BY-SA 4.0.