EMO

noun

1. (early 1990s) A particular style of hardcore punk rock
2. (early 1990s) An individual or group of people associated with that subculture and musical style.
3. (late 1990s-current) Any form of guitar-driven alternative rock that is particularly or notably emotional

adjective

1. Emotional; sensitive.
2. Depressed.
3. Associated with youth subcultures embodying emotional sensitivity.