Like everything else, Preppiness begins in the home.
It is the inalienable right of every man, woman, and child to wear khaki.
Sarcasm mascarades as the Preppy's sense of humor.
Wool, cotton, and the odd bits of silk and cashmere are the only acceptable materials for Prep clothes. They look better. They require professional maintenance. They are more expensive.
Preppy clothes are built to last, since they certainly won't go out of style.
Cynicism is more than a pose; it's also a handy time saver. By deflating your companion's enthusiasm, you can cut conversations in half.