preppy

or prep·pie

[ prep-ee ]
/ ˈprɛp i /

noun, plural prep·pies.

a person who is a student at or a graduate of a preparatory school.
a person who favors or is viewed as favoring clothing style or behavior associated with traditional preparatory schools.

adjective, prep·pi·er, prep·pi·est.

of, relating to, or characteristic of preparatory schools or their students.
of, pertaining to, characteristic of, or being a style in dress or mode of behavior of a preppy.

Origin of preppy

An Americanism dating back to 1895–1900; prep + -y1, -y2

British Dictionary definitions for preppier

preppy
/ (ˈprɛpɪ) informal /

adjective

characteristic of or denoting a fashion style of neat, understated, and often expensive clothes; young but classic: suggesting that the wearer is well off, upper class, and conservative

noun plural -pies

a person exhibiting such style

Word Origin for preppy

C20: originally US, from preppy a person who attends or has attended a preparatory school before college