1. The words which crop up most often in emo speech, music and literature, most commonly 'black', 'hate', 'pain', and 'death', among many others.

2. (Of a foreign emo band) Whether or not the listener understands any of the simplest verbs and nouns, there will be instantly recognisable and heavily used emo words (e.g. pain, death etc.) repeating in each song. C.f. Tokio Hotel

Literally everyone, ever. Including the writer of this definition.