Pronounced: Pee-Tree-d
Petri'ed: Being cultured and
understanding the customs, arts, social behaviours, and accomplishments of a
particular nation, people, or other social group.
Being cultured, you're educated. Also, when you culture something in a biology sense, you’re physically growing something and also educating yourself on that biological item; often in a Petri Dish. Therefore, being Petri'ed is
understanding the social constructs of a group of people and growing your education in that.