Someone who deliberately, actively and habitually tries to look up women's and girls skirts to see their panties. Note that this is different from the casual voyeur who just enjoys the occassional accidental flash of a girls knickers. upskirt voyeur flashing
I overheard one girl say to her friend. "Don't ever walk upstairs or ride the escalator in front of John ****, he's a real "Panty Peeper"
A peeper party is a party where everyone that is attending the party agrees to either be a peeper or a Peepee. Only the Peepees may enter the house, however, they must remove all of their clothes before doing so. The Peepeers must remain outside of the house, although peeping into the windows and wanking is strongly encouraged.
Goddamn neighbor. That woman stands naked in her window watching me have a wank and I'm the criminal!? They better not break up my next peeper party.