It's when you go to Vegas for the weekend and get so pie-eyed the first night, you go up to your room to pass out. When you awake you are face down in your own vomit and covered in your own feces. You then realize it's Monday and your plane leaves in an hour. Not knowing what else to do, you drop your stool caked shorts in the garbage on the housekeeping cart as you leave. true story.
When one is using Macintosh OS X, and the computer crashes by turning the cursor into a pinwheel and not letting you do anything. SImilar to the Blue Screen of death from the old Windows NT days, but, like many Apple products, cuter and more friendly looking.
"Whoops! I tried to open two programs at once on this iMac with the stock 256mb of RAM. Now the keyboard and mouse button aren't working."
"Yup. Looks like you got the old pinwheel of death."
Used almost exclusively at Shaw Communications, a pinwheel jerk is a morale building activity similar to a circle jerk, but instead of jerking yourself off, you jerk off the colleague to the right of you.