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1.
When you wake up in the morning and find you've shit yourself while you were sleeping. (Also, see wet willy for the piss version.)
"I had a really bad dirty donnie last night. Don't eat donuts before you go to bed."
by Chocolate Custard April 06, 2009
 
2.
After engaging in anal sex, the female then shits all over the floor, and pees into a nearby bucket.
"Dude, did you hear what happened to Kevin"
"No, what!"
"He was doing some fat chick last night and she pulled a Dirty Donnie all over his kitchen!"
"Thats fucking nasty"
"Tell me about it"
by pauliebrownie June 20, 2006