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1.
noun: A particularly creepy middle-aged peeping Tom who must always secretly video others doing sexual or lewd acts for his later enjoyment.
I found my Uncle's Dirty Donald videos; I was in them!
by Greg Bahamas April 25, 2009
 
2.
Another name for Mcdonalds, so called because of the unhealthy food served there. (See Dirty Snack)
Feeling in the mood for a Big Mac, Dave decided to visit Dirty Donalds.
by BOBtheDAZZLER March 02, 2009
 
3.
When you sneek up behind someone and rip a nasty, stinky, crunchy, wet fart on their back, leaving a streak of mud-butt.
Damn that was a Dirty Donald if I"ve ever seen one...wipe that off your back!!
by BuckeyeGuy April 15, 2009