The physical and mental state sometimes aquired by someone who consistently smokes, or used to smoke, a lot of weed. Typically characterized by the feeling and appearance of being stoned even when one is still technically sober.
See: Tommy Chong. The guy who works at your local smoke shop. Any stoner with a seemingly permanent smile and lazy eyes.
"Man, my dad hasn't smoked in years, but you can tell he's permastoned from his days on the commune".
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