|"I'm a pervert he's a pervert she's a pervert we're a pervert wouldn't you like to be a pervert too?"|
"DP" is supposed to be for "Dr. Pepper". But in the mind sewer that is the Internet, it means something else.
(To put it as politely as possible, Wikipedia's disambiguation page for "DP"includes "Double penetration, a variant of group sex".)