straight edge

People within the hardcore/punk culture that claim the straight edge abstain from drugs, drinking, irresponsible sex or sex without love, and often from eating meat, dairy, or both. Occasionally straight edgers will avoid caffeine. Straight edge is a movement credited to Ian MacKaye of 80s hardcore band Minor Threat, who penned the song Straight Edge. Many straight-edgers draw black X’s on their hands to signify their choice — an action that harks back to the late 1970s/early 1980s, when bouncers would draw black X’s on the hands of kids who were underage so that bartenders would know not to serve them alcohol.