n. pl. prep·pies 1. A student or former student of a preparatory school. 2. A person whose manner and dress are deemed typical of traditional preparatory schools. adj. prep·pi·er, prep·pi·est Of or relating to a preppy or a preparatory school. [PREP(ARATORY SCHOOL) + -Y1.] preppi·ly adv. preppi·ness n. |
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