One who uses recreational (mostly non-addictive) drugsdaily while maintaining an otherwise normal life.
During the 1970's, most teenagers lived a functionally bent life while doing drugs every day and attending school under the influence of those substances.
the "bent knuckle" affect is......I went out with the boyz last night and got drunk. afterwards I hooked up with my girl and gave her the bent knuckle. thank god for K-Y and a shoe horn