When you sit down on the toilet and some nasty, foul smelling, brown organic material comes shooting out of your ass. It makes a loud splattering noise as it crashes into the walls of the porcelain.
This isn't just any shit though. A true "Donald" is reserved only for the most obnoxious, painful, miserable times you sit and do your business.
Open the fucking bathroom door. I gotta get in there and take a donald.