The most obscene sexual act in the realm of human comprehension. This act can be a combination of whatever the giver chooses, but must involve at least 3 foreign objects, 3 people, and 3 position changes and fluid.
"I brought the bullet casings and the latex gloves, if you've got the recycling we're ready to Donkey9!"
"Preheat the oven! We're gonna Donkey9!"
"I Donkey9ed so hard last night my ears bled"
"Bro, this one's a keeper! She let me and my roommate Donkey9 her last night"