straight edge

Etymology
The subculture takes the name from the 1981 song Straight Edge by the hardcore punk band Minor Threat. Compare attested since the 1904.

Noun

 * 1)  A lifestyle and subculture that advocates abstinence from alcohol, tobacco and the usage of recreational drugs.
 * 2)  One who follows this lifestyle.
 * 1)  One who follows this lifestyle.

Adjective

 * 1)   Living one's life opposing or eschewing the use of substances such as alcohol, tobacco, and drugs.