when a woman of the female sex has two penises inserted any combo of her mouth, anus, or vagina, but is most commonly done in the anus and vagina

2 dicks in one chic

Simultanious penetration of a women's vagina and anus by two men

when two guys have their penises in a girls ass and pussy at the same time. There is usually alot of ball bumping(two mens nuts rubbing together)

one in the pink and one in the stink

when a heterosexual couple outsources the girl's asshole.

When a girl has two of her three holes filled. The three holes being the mouth, vagina & ass. To receive official double penetration (DP) honors the penetration must be delivered by one of the items on the below list:
*Penis
*Minimum of three fingers or a fist.
*Dildo, vegetable or other object (penis sized or larger)
*Three dildos vegetables or other objects (smaller than penis sized)
*Flashlight regardless of size or shape.

The penetrations may occur in separate holes or the same hole but they must occur simultaneously.

Furthermore, the mouth can only be penetrated by a penis for official DP honors to be received and no amount of fingers, fists, dildos or even flashlights in the mouth can earn the official DP honors.