a "permanent grin" which one can only achieve through being in a totally different dimension (usually through use of peyote, lsd, and is definitely popular with shrooms)
guy1: so herd everyone went trippin this weekend, how was it?
guy2: it was great, everyone was real chill, paul's dumbass had a stupid perma grin that he couldnt wipe off and he didnt say shit the whole time. Hes such a sleezebag.
An automatic and irremovable smile that appears on the face of people who are thoroughly intoxicated with some narcotic; usually marijuana, hashish, mushrooms, or lsd. Can be found in other cases such as on television morning news anchors, beauty pageant contestants, pop queens, and mental patients.