Guyliner: that’s a new one for me:
In recent years, the definition of emo has broadened. Today, some mainstream musical acts like Fall Out Boy are considered to be (at least partly) emo. Many teens and young adults have taken to dressing in an emo fashion. This includes, but is not limited to, sporting tight T-shirts, crusty hair brushed to one side, horn-rimmed glasses, and eyeliner (or “guyliner” as the case may be). Basically, anything that suggests an air of vulnerability.