DP stands for double penetration. It is when one person is being penetrated by two penises at the same time. Typically, it means one vaginally and one anally. The term can also refer to one orally and one vaginally or one orally and one anally. This term can be used for both men and women, but is a lot more common to be used for women.
Yeah we had an orgy last night and megan got DP.
Dick Pics. What you can say to your friends at school without getting in trouble.
DP is a common way of introducing someone in a very sweet and wholesome manner.
When John entered my home, I greeted him with a polite DP.
Against all odds, when one wants to backup data, say for example movie collection picturing most of the other dp definitions found here. Such means can be achieved via copy, or dedicated software/(very)hardware solution.
Two penises or otherwise phallic objects penetrating two of a person's orifices at once–be it the vaginas, the mouth and pussy, the ass and pussy, or the mouth and ass, so long as the actions occur at the same time.
The one benefit of having been born with two penises is that I don't need a buddy to practice DP.