2) a blank, complacent smile experienced after smoking an especially copious ammount of marijuana. permagrin will often fade once the initial high tapers off a bit, and the smoker regains cognitive abilities.
3) the blank, starry eyed grin which acompanies the ingestion of psychedelics. this type of permagrin typically occurs while observing something particularly prone to producing hallucinations, such as a moving light or toy.
Jane: "Yep. Ten back to back orgasms. I love Reggie..."
2) Mike: "Heh... looks like those brownies are kicking in. Kev's totally got permagrin..."
3) Rich: "Is Raul tripping? He's been staring at that mirror for fifteen minutes with this permagrin on his face the entire time."
Look at the Prema-Grin that Christina is wearing this morning! I wonder who she was with last night?
"He had a permagrin on his face from ear to ear. The blissful look was undeniable, This man is happy. . . . . "
The outward expression of absolute bliss.
Just the thought of the 311 cruise gives Julie permagrin!