Reversy Percy (Ree-vursee Pur-see)
a. After narcotising someone with Rohypnol AND Viagra, then climbing on and having your wicked way with them/yourself, entirely without your victim/abusers knowledge, you can claim to have performed a Reversy Percy, a feat of such moral paradox and logistical difficulty that it is topped only by a Hitler Youth DVDA.
b. Bag of sweets sold by popular British high street retailer, Marks and Spencers.
Well don't look at me, I was too busy Blumphing my Chin-Gorilla on Des Lynams Private Idaho(ibid) to do a Reversy Percy