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1 definition by StoneyBaby

A long-lasting, most likely goofy looking smile that does not go away for an extended period of time. This most likely happens when surrounded by awesome company, and great music in the middle of the ocean or on a tropical island.

The outward expression of absolute bliss.
Julie had permagrin the entire time she was rocking on the 311 Cruise ship!

Just the thought of the 311 cruise gives Julie permagrin!
by StoneyBaby November 14, 2012