Boorish

So, he lacked in social experience. His demeanor abhorred grace. His words weren't tactful. His goals were crude. You could have said he was gauche, but knowing how much money he was grabbing, you had to see he was merely ill-mannered, coarse, and contemptible. His cloak of culture was what always threw people. As a maggot, he'd have qualified as gauche. As it were, he was an opportunist. Radical leftist when it pleased the girls, reformed maoist when the wind turned, always on the side of pleasurable expediency.