American English

Definition of preppy noun from the Oxford Advanced American Dictionary

 

preppy

 noun
(also preppie) noun
NAmE//ˈprɛpi//
 
(pl. preppies) (informal)
 
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a young person who goes or went to an expensive private school and who dresses and acts in a way that is thought to be typical of such a school
preppy (also preppie) adjective
 
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a preppy image preppy clothes