1. A person who is a total poser that shops at either Abercrombie, Hollister, Victoria's Secret, Ruehl, Lacoste, or American Eagle on a regular basis.
2. Someone who uses ditxy phrases like "watevs" and "lyk".
3. A complete bitch whp has nothing better to do with her life but shop at Abercrombie ad talk about how sensitive they are and talk about their friends behind their backs.
4. Someone who is popular(or thinks they're popular)and thinnks everyone should worship the ground they walk on.
5. A person who has nothing better to do than try and gainpopularity by gossiping and shopping.
6. Someone who feels the need to apply lip gloss at least 15 times every three minutes.
7. someone who cannot go two minutes without saying "like or "omigosh" in every sentence.

–noun
1. a person who is a student at or a graduate of a preparatory school.
2. a person who favors or is viewed as favoring clothing style or behavior associated with traditional preparatory schools.
–adjective
3. of, pertaining to, or characteristic of preparatory schools or their students.
4. of, pertaining to, characteristic of, or being a style in dress or mode of behavior of a preppy.

Basically, collared shirts, khaki pants, the whole nine yards. Some people say preppy is Hollister Co., Abercrombie & Fitch, ect.