Any form of guitar-driven alternative rock that is particularly or notably emotional; a broadly encompassing genre of rock music characterized by expressive, often confessional lyrics. • 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). • 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. • A commercially successful 2000s alternative rock and pop-punk movement characterized by theatricality, melancholic, or romantically frustrated themes, and highly polished production. • Electronic-infused subgenres incorporating aggressive, satirical, or hedonistic themes layered over post-hardcore or pop-punk foundations (e.g., crunkcore, neon pop-punk). • An individual presenting as such, intentionally or otherwise. • A person associated with that subculture and musical style. • A person associated with a fashion or stereotype of that style of rock. • A participant in the heavily aestheticized 2000s and 2010s subculture. • (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. • Sometimes used pejoratively to imply inauthenticity (poser) or used ironically to denote exaggerated teenage rebellion.