PerM A GriN = A state of real, complete, happiness, usually associated with a long lasting smile with blissfully wide post-coital grin. This blank, starry eyed grin is only experienced under rare conditions in the mountains, open freeways, water and occasionally Sky
Motorcycle + Loud AMAZING Music + Open Highway = PERMAGRIN
"He had a permagrin on his face from ear to ear. The blissful look was undeniable, This man is happy. . . . . "