look up any word, like ratchet:
 
1.
when students of prep schools, the top L.A.C.'s (little ivies, seven sisters, ect.) and the Ivies dress preppy and participate in preppy sports.

Also used as "prep out"
When I go to Harvard, I am going to prep out.

"I am totally prepping out this semester."
by wasp1 May 28, 2012