emo

Etymology 1

Abbreviation of emocore.

noun

1. (uncountable, music) A particular style of hardcore punk rock
2. (countable) An individual of people associated with that subculture and musical style.
3. (uncountable, music) Any form of guitar-driven alternative rock that is particularly or notably emotional
4. (countable) An individual of people associated with a fashion or stereotype of that style of rock.
5. (countable) A young person who is considered to be over-emotional or stereotypically emo.

Etymology 2

Abbreviation of emotional.

adj

1. (often derogatory) Emotional; sensitive.
2. (informal, often derogatory) Depressed.
   Criticism drapes a black velvet cape across the puddle that interrupts the path to change, to be emo about it. 2008, Vanity Fair, number 578
3. Associated with youth subcultures embodying emotional sensitivity.
   The one thing everyone agrees on is that they've never encountered a band that claimed to be emo. 2007, James A. Reinking, Robert Von Der Osten, Strategies for successful writing
   Trevor looks kind of emo, rail thin, dark hair, guyliner, wears black all the time. 2012, Megan Bostic, Never Eighteen